Analiza Fișierelor de date Furnizate de Sistemele GNSS

8/11/2019 Analiza Fiierelor de date Furnizate de Sistemele GNSS

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Universitatea "Politehnica" din Timioara

Facultatea de Construcii

Master : Cadastru iEvaluare Bunurilor Imobile

Interpretarea i Analizarea Fiierelor de

date Furnizate de Sistemele GNSS

Masterand : Ciobanu Alina Coordonator: .l.dr. ing Alina Bl

2013


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CUPRINS

1 Descrcarea i analizarea fiierelor de date

tip GNSS folosind:

http://igs.bkg.bund.de i www.epncb.oma.be

2 Interpretarea fiierelor de navigaiefolosind softul JAVAD Rinex Viewer

3 Bibliografie


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1 DESCRCAREA I ANALIZAREA FIIERELOR DE DATE TIP GNSS

GNSS Data Center (GDC)este un centru de date al serviciului de Bundesamt fr Kartographie

und Geodsie (BKG) (Agenia Federal pentru Cartografie i Geodezie), care este o autoritate

federal atribuitMinisterului Federal de Interne. Sarcinile BKG constau n furnizarea sistemelor

de referin geospaiale i de baz pe teritoriul Republicii Federale Germane. Sisteme globale de

navigaie prin satelit(GNSS), de exemplu, GPS-ul , sistemul rusesc GLONASS i viitorul sistem

european Galileo, sunt n prezent tehnici importante de referin spaiale i de poziionare

precis.

GDC sprijin proiecte internaionale menionate la reelele de urmrire GNSS prin stocarea i

transferul de date aferente. Disponibilitatea msurtorilor GNSS originale, aa cum sa observat

la staiile de urmrire i informaii suplimentare, de exemplu, informaii cu privire la poziiilesateliilor (orbite), sunt cerinele cheie pentru diverse aplicaiipentru utilizator, n colaborare cu

organizaiile internaionale.

GDC este structurat peproiecte i necesit o selecie cu ajutorul filtrului de proiect. Pentru unele

pagini din seciunea Date & Produse- un buton de ajutor va fi afiat n bara de meniu pentru a

oferi informaii suplimentare cu privire la manipularea acestor pagini.

GDC deine, de asemenea, informaii despre transportul n reea de RTCM prin Protocol Internet

(NTRIP). Seciunea NTRIP ofer informaiicu privire la software-ul de fluxuri de date n timpreal i produse GNSS.

BKG a GNSS Data Center (GDC) prevede date de urmrire GLONASS i produse de nsoitor.

Obinerea de date de la staiile de urmrire individuale este structuratn funcie de apartenena

la proiecte globale, regionale i naionale, cu acces public i parial restricionat.

n continuare vom descrca i analiza fiierele de date pentru dou staii de referin i anume :

1. Staia de referi BACU (BACA)- Romnia;

2. Staia de referin EGLETONS (EGLT ) - Frana.


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1.1 Staia de referi BACU (BACA)- Romnia.

Staie se afl n Nord-Estul rii, n partea central-vestic a Moldovei.

Figura 1.1 Poziia staiei Bacu

Informaii generale despre aceast staie:

Proiect: EUREF

Data propus: 22.03.2013

Nume: Bacu (BACA)

ara: Romnia.

Poziia aproximativ (coordonate) :

X= 3917525.40 m

Y= 1988523.90 m

Z= 4608585.50 m

Latitudinea (N cu +) = +463343.41

Longitudinea (E cu +) = +0265443.96

Elevaia (m, elipsa) = 219.2 m

Date de contact: [email protected];[email protected]

Tipul de receptor activ la ora actual:

Figura 1.2 Date Receptorul activ


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ns sau mai fcut instalri nainte de situaiaactual aa cum putem observa n cele dou figuri

de mai jos.

Figura 1.3 Datele receptorilor mai vechi

Tipul antenei :

Figura 1.4 Datele antenei active Figura 1.5 Antena

Senzorii care sunt instalaii staiei:

1. Umiditatea cu urmtoarele caracteristici:

Figura 1.6 Datele senzorului de umiditate

2.

Presiunea:

Figura 1.7 Datele senzorului de presiune

3.

Temperatura:

Figura 1.8 Datele senzorului de temperatur


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4. Radiometrul vaporilor de ap nu este instalat ca senzor.

Analiznd toate datele de mai sus, va rezulta :

Graficile caracteristice acestei staii sunt:

a) tipul de observaii:

Aici putem vedea o legtur ntre observaiile minime i cele maxime pentru aceast staie.

Diagrama ne arat modul n care observarea staiei se ncadreaz n limita admis prin

compararea cu alte staii.

Figura 1.9 Tipul de observaii

n diagrama de mai jos, putem vedea observaiile fcute cu o zi nainte de stocarea datelor,

acestea fiind marcate cu un punct albastru. Mai putem vedea deviaia standard de observaii n

ultimele 30 de zile iar cu rou sunt simbolizatecelelalte staii din proiect.

b)

c)

Figura 1.10 Tipul de observaii realizate cu o zi nainte


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d) efectul de multipath:

n aceste 2 diagrame putem vedea multipath MP1 i MP2, marcat cu un punct albastru.

Figura 1.11 Efectul de multipath

n cele 2 imagini de mai jos "skyplots" putem vedea MP1 multipath i MP2 pentru pentrufiecare satelit.

Figura 1.12 Skyplots

e) ntreruperile de msurtori:

Din diagram, putem vedea raportul de observaii, comparativ cu ntreruperile de msurtori,acestea fiind marcate cu un punct albastru.

Figura 1.13 ntreruperile de msurtori


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f) efectul ionosferic:

n imagini sunt reprezentate ntrziereai derivatul ionosferic pentru fiecare satelit.

Figura 1.14 Efectul ionosferic

g) semnal zgomot:

ns aici ne este afiatraia de zgomot semnal pe frecvenele L1 i L2 pentru fiecare satelit.

Figura 1.15 Raia zgomot semnal

Vom descrca i analiza fiierede date furnizate de sistemele GNSS, n cazul nostru fiind doarpentru GPS i anume:

GPS Navigation - date de navigare GPS;

GPS only Obs - numai observaii GPS.

Pentru staia Bacu fiierul GPS Navigation arat n felul urmtor:


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2.10 NAVIGATION DATA RINEX VERSION / TYPE

SPIDER V4,3,0,4633 ROU 2013 12 07 00:00 PGM / RUN BY / DATE

2.5146D-08 0.0000D+00 -1.1921D-07 1.7881D-07 ION ALPHA

1.4131D+05 -1.8022D+05 0.0000D+00 6.5536D+04 ION BETA

-2.793967723846D-09-7.993605777301D-15 147456 1770 DELTA-UTC: A0,A1,T,W

16 LEAP SECONDS

END OF HEADER

1 13 12 06 00 00 0.0 9.183445945382D-05 2.955857780762D-12 0.000000000000D+00

7.600000000000D+01 1.609375000000D+01 4.652693785800D-09 1.081123606486D+00

7.655471563339D-07 2.558098407462D-03 9.208917617798D-06 5.153683576584D+03

4.320000000000D+05 7.078051567078D-08 1.434815959855D+00 2.235174179077D-08

9.600940545825D-01 2.012812500000D+02 4.343602149036D-01-8.020333730485D-09

6.053823553565D-10 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

2.000000000000D+00 0.000000000000D+00 7.916241884232D-09 7.600000000000D+01

4.247400000000D+05 0.000000000000D+00

2 13 12 05 19 59 44.0 4.652314819396D-04 2.160049916711D-12 0.000000000000D+00

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9.368363766869D-01 1.880625000000D+02 1.354311092264D+00-8.508211912783D-09


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-1.285767881054D-10 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

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4.103400000000D+05 0.000000000000D+00

7 13 12 05 22 00 0.0 2.883360721171D-04 4.206412995700D-12 0.000000000000D+00


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9.500000000000D+01 1.095937500000D+02 4.204103731809D-09-5.149789969994D-01

5.627050995827D-06 6.990462075919D-03 5.109235644341D-06 5.153663549423D+03

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1.564350871064D-10 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

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-2.985838520875D-10 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

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4.175400000000D+05 0.000000000000D+00

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4.031400000000D+05 0.000000000000D+00

21 13 12 05 12 00 0.0-3.316476941109D-04-1.705302565824D-12 0.000000000000D+00


15/3915

8.500000000000D+01 3.653125000000D+01 5.654521295639D-09-3.335890296764D-01

2.047047019005D-06 2.073351910803D-02 7.782131433487D-06 5.153585334778D+03

3.888000000000D+05-1.043081283569D-07 1.427950703284D+00 2.719461917877D-07

9.314796402773D-01 2.156875000000D+02-2.086142252907D+00-8.923229266600D-09

5.207359543569D-10 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

2.000000000000D+00 0.000000000000D+00-1.117587089539D-08 8.500000000000D+01

3.815400000000D+05 0.000000000000D+00

22 13 12 06 00 00 0.0 1.991274766624D-04 2.273736754432D-12 0.000000000000D+00

2.500000000000D+01-1.246875000000D+01 5.821314097432D-09-1.905015331421D+00

-6.370246410370D-07 6.684554857202D-03 5.552545189857D-06 5.153632204056D+03

4.320000000000D+05 1.043081283569D-07 2.476472653723D+00 1.490116119385D-08

9.241108034157D-01 2.494062500000D+02-2.049950726093D+00-8.561070963253D-09

-2.150089550845D-10 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

2.000000000000D+00 0.000000000000D+00-1.722946763039D-08 2.500000000000D+01

4.247400000000D+05 0.000000000000D+00

23 13 12 05 20 00 0.0 2.410775050521D-05-3.296918293927D-12 0.000000000000D+00

2.000000000000D+01 4.909375000000D+01 4.483043714032D-09 4.646002530368D-02

2.479180693626D-06 8.841408882290D-03 1.120567321777D-05 5.153630893707D+03

4.176000000000D+05 4.842877388000D-08-2.746305650791D+00 9.872019290924D-08

9.540478639001D-01 1.581875000000D+02-2.807537498715D+00-8.080336399985D-09

-4.728768487894D-10 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

2.000000000000D+00 0.000000000000D+00-2.002343535423D-08 2.000000000000D+01

4.103400000000D+05 0.000000000000D+00

24 13 12 06 00 00 0.0-1.931469887495D-05-6.821210263297D-13 0.000000000000D+00

6.100000000000D+01 1.226562500000D+02 4.674837406071D-09 1.635405344511D+00

6.491318345070D-06 1.460945233703D-03 4.993751645088D-06 5.153645523071D+03

4.320000000000D+05 2.607703208923D-08-1.719631796698D+00 6.705522537231D-08

9.578151134841D-01 2.801875000000D+02 8.375109743795D-02-8.341062063266D-09


16/3916

1.792931775269D-10 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

2.800000000000D+00 0.000000000000D+00 2.793967723846D-09 6.100000000000D+01

4.247400000000D+05 0.000000000000D+00

25 13 12 05 07 59 44.0 2.887099981308D-08 2.842170943040D-12 0.000000000000D+00

5.100000000000D+01-9.887500000000D+01 4.551618193460D-09-2.780684796192D+00

-5.114823579788D-06 2.823187387548D-03 1.814216375351D-06 5.153685420990D+03

3.743840000000D+05-5.215406417847D-08-6.665355603615D-01-5.215406417847D-08

9.748798787915D-01 3.512812500000D+02 6.605286987687D-01-8.381777938382D-09

-2.450102065676D-10 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

2.000000000000D+00 1.000000000000D+00 5.587935447693D-09 5.100000000000D+01

3.671100000000D+05 0.000000000000D+00

26 13 12 06 00 00 0.0 2.302848733962D-04-1.045918907039D-11 0.000000000000D+00

8.900000000000D+01 5.290625000000D+01 3.917663082831D-09 2.138886630493D+00

2.510845661163D-06 2.117404586170D-02 1.191720366478D-05 5.153688056946D+03

4.320000000000D+05 9.685754776001D-08-2.661728342572D+00-4.116445779800D-07

9.772309929534D-01 1.538750000000D+02 1.255280505986D+00-7.421737890922D-09

-3.107272217306D-10 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

2.000000000000D+00 0.000000000000D+00-6.053596735001D-09 8.900000000000D+01

4.247400000000D+05 0.000000000000D+00

27 13 12 05 22 00 0.0-5.708076059818D-06-3.069544618484D-12 0.000000000000D+00

6.100000000000D+01-1.265625000000D+02 4.149458554537D-09 1.961971012745D+00

-6.513670086861D-06 4.764691693708D-04 1.054629683495D-05 5.153678951263D+03

4.248000000000D+05 5.960464477539D-08 3.813935439891D-01-2.421438694000D-08

9.620448850996D-01 1.748437500000D+02 5.116818429740D-01-7.888900199760D-09

5.535944966328D-11 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

2.000000000000D+00 0.000000000000D+00 1.862645149231D-09 6.100000000000D+01

4.175400000000D+05 0.000000000000D+00

28 13 12 05 23 59 44.0 3.142971545458D-04 3.069544618484D-12 0.000000000000D+00


17/3917

8.000000000000D+00-7.337500000000D+01 4.018738675171D-09-2.090887416414D+00

-3.641471266747D-06 1.915770047344D-02 1.534819602966D-06 5.153657030106D+03

4.319840000000D+05 3.557652235031D-07-6.020871798278D-01 2.793967723846D-08

9.852702705416D-01 3.593750000000D+02-1.750144121922D+00-7.867113183124D-09

-1.639354069161D-10 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

2.000000000000D+00 0.000000000000D+00-1.071020960808D-08 8.000000000000D+00

4.247100000000D+05 0.000000000000D+00

29 13 12 05 10 00 0.0 4.926305264235D-04 3.183231456205D-12 0.000000000000D+00

6.400000000000D+01-9.537500000000D+01 4.072669756994D-09-1.047174624832D+00

-4.902482032776D-06 1.491506467573D-03 1.267157495022D-05 5.153802848816D+03

3.816000000000D+05-1.862645149231D-08 4.350652287731D-01-6.146728992462D-08

9.680457999304D-01 1.347812500000D+02-1.007651176282D+00-7.799967782773D-09

1.421487788589D-10 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

2.000000000000D+00 0.000000000000D+00-9.313225746155D-09 6.400000000000D+01

3.743400000000D+05 0.000000000000D+00

31 13 12 05 18 00 0.0 3.307135775685D-04 5.684341886081D-13 0.000000000000D+00

7.800000000000D+01 1.210312500000D+02 4.056597724400D-09-2.563990667200D+00

6.398186087608D-06 8.174549089745D-03 4.857778549194D-06 5.153730043411D+03

4.104000000000D+05-3.166496753693D-08-1.682308863671D+00 1.117587089539D-07

9.793119456448D-01 2.981562500000D+02-7.105816479493D-01-7.978903759920D-09

2.732256643156D-10 1.000000000000D+00 1.769000000000D+03 0.000000000000D+00

2.000000000000D+00 0.000000000000D+00-1.303851604462D-08 7.800000000000D+01

4.031400000000D+05 0.000000000000D+00

32 13 12 05 18 00 0.0-5.206330679357D-04 5.115907697473D-12 0.000000000000D+00

Unde:

Prima linie din acest fiier reprezint :2.10 NAVIGATION DATA RINEX VERSION /

TYPE


18/3918

Cea de-a doua linie :

SPIDER V4,3,0,4633 ROU 2013 12 07 00:00 PGM / RUN BY /DATE

Cea de-a treia linie: ne sunt dai parametrii ionosferici i anume parametru alfa.

2.5146D-08 0.0000D+00 -1.1921D-07 1.7881D-07 ION ALPHA

Cea de-a patra linie: ne sunt dai parametrii ionosferici i anume parametru beta.

1.4131D+05 -1.8022D+05 0.0000D+00 6.5536D+04 ION BETA

Cea de-a cincea linie: reprezint parametrii almanah pentru a calcula timpul n UTC.Unde:

A0, A1 sunt punctele de vedere;

T - timpul de referin pentru data UTC;

W - numrul sptmnii.

-2.793967723846D-09-7.993605777301D-15 147456 1770 DELTA-UTC: A0,A1,T,W

Cea de-a asea linie:

16 LEAP SECONDS

Cea de-a aptea linie: 1 reprezint primul satelit adic G1- GPS 1.

1 13 12 06 00 00 0.0 9.183445945382D-05 2.955857780762D-12 0.000000000000D+00

Iar n continuare fiecare linie reprezint calculul ambiguitii pentru fiecare numr desatelit.

Pe cnd fiierul GPS only Obs arat astfel:

2.11 OBSERVATION DATA G RINEX VERSION / TYPESPIDER V4,3,0,4633 ROU 2013 12 07 00:00 PGM / RUN BY / DATEBACA MARKER NAME11405M001 MARKER NUMBER


19/3919

Vlad Sorta ANCPI OBSERVER / AGENCY452503 LEICA GRX1200PRO 8.51/2.127 REC # / TYPE / VERS102525 LEIAT504 LEIS ANT # / TYPE

3917525.3087 1988523.8804 4608585.4043 APPROX POSITION XYZ0.0000 0.0000 0.0000 ANTENNA: DELTA H/E/N

1 1 WAVELENGTH FACT L1/26 C1 L1 D1 P2 L2 D2 # / TYPES OF OBSERV30.000 INTERVAL

2013 12 06 00 00 0.0000000 GPS TIME OF FIRST OBS2013 12 06 23 59 30.0000000 GPS TIME OF LAST OBS

16 LEAP SECONDS31 # OF SATELLITES

G 1 876 876 876 876 876 876 PRN / # OF OBSG 2 1043 1043 1043 1043 1043 1043 PRN / # OF OBSG 3 931 931 931 931 931 931 PRN / # OF OBSG 4 1044 1044 1044 1044 1044 1044 PRN / # OF OBSG 5 1038 1038 1038 1038 1038 1038 PRN / # OF OBSG 6 766 766 766 766 766 766 PRN / # OF OBSG 7 781 781 781 781 781 781 PRN / # OF OBSG 8 812 812 812 812 812 812 PRN / # OF OBSG 9 800 800 800 800 800 800 PRN / # OF OBS

G10 935 935 935 935 935 935 PRN / # OF OBSG11 765 765 765 765 765 765 PRN / # OF OBSG12 834 834 834 834 834 834 PRN / # OF OBSG13 822 822 822 822 822 822 PRN / # OF OBSG14 1032 1032 1032 1032 1032 1032 PRN / # OF OBSG15 1010 1010 1010 1010 1010 1010 PRN / # OF OBSG16 1031 1031 1031 1031 1031 1031 PRN / # OF OBSG17 1047 1047 1047 1047 1047 1047 PRN / # OF OBSG18 981 981 981 981 981 981 PRN / # OF OBSG19 961 961 961 961 961 961 PRN / # OF OBSG20 810 810 810 810 810 810 PRN / # OF OBSG21 803 803 803 803 803 803 PRN / # OF OBSG22 835 835 835 835 835 835 PRN / # OF OBS

G23 819 819 819 819 819 819 PRN / # OF OBSG24 772 772 772 772 772 772 PRN / # OF OBSG25 791 791 791 791 791 791 PRN / # OF OBSG26 870 870 870 870 870 870 PRN / # OF OBSG27 866 866 866 866 866 866 PRN / # OF OBSG28 973 973 973 973 973 973 PRN / # OF OBSG29 827 827 827 827 827 827 PRN / # OF OBSG31 1056 1056 1056 1056 1056 1056 PRN / # OF OBSG32 832 832 832 832 832 832 PRN / # OF OBS

BIT 2 OF LLI FLAGS DATA COLLECTED UNDER A/S CONDITION COMMENTSNR is mapped to RINEX snr flag value [1-9] COMMENTLx: >= 25dBHz -> 1; 26-27dBHz -> 2; 28-31dBHz -> 3 COMMENT

32-35dBHz -> 4; 36-38dBHz -> 5; 39-41dBHz -> 6 COMMENT

42-44dBHz -> 7; 45-48dBHz -> 8; >=49dBHz -> 9 COMMENTEND OF HEADER

13 12 06 00 00 0.0000000 0 7G04G12G15G17G24G26G2824299891.160 127696781.21506 3069.121 24299891.360

99503973.121442391.520

22192638.840 116623122.58808 2569.801 22192636.62090875159.35347

2002.43822122661.240 116255366.37808 -2561.125 22122659.940

90588586.62548-1995.684

21658080.180 113813991.26409 -1373.297 21658078.280

88686228.33348-1070.105

20602287.200 108265753.95309 1352.031 20602287.94084362941.56249


20/3920

1053.52724268159.820 127530032.20006 -4094.879 24268160.200

99374043.63745-3190.816

24671859.800 129651500.74706 -2798.574 24671857.760101027143.19443

-2180.711

Acest tip de fiier difer de cellat avnd anumite caracteristici n plus i anume:

prima linie :

2.11 OBSERVATION DATA G RINEX VERSION / TYPE

a doua linie:

SPIDER V4,3,0,4633 ROU 2013 12 07 00:00 PGM / RUN BY /

a treia linie reprezint numele prescurtat al staie, aa o putem gsim n irul de staii

incluse n lista cu toate staiile.

BACA MARKER NAME

a patra linie reprezint numrul prin care se identific staia respectiv.

11405M001 MARKER NUMBER

a cincea linie:

Vlad Sorta ANCPI OBSERVER / AGENCY

a asea linie:


21/3921

a aptea linie:

a opta linie reprezint poziia aproximativ a staiei avnd coordonatele X, Y i Z.

3917525.3087 1988523.8804 4608585.4043 APPROX POSITION XYZ

a noua linie: ne este dat nlimea i excentricitatea antenei.

0.0000 0.0000 0.0000 ANTENNA: DELTA H/E/N

a zecea linie: cifrele care sunt marcate cu rou reprezint factorul lungimii de und impusde softul respectiv pe cele dou benzi de frecven L1 i L2.

linia 11: Aa dar prin culoare roie este reperzentat numrul total de observaii; princuloarea verde sunt reprezentate codurile C1 pe L1 i P2 pe L2; prin culoarea galbensunt reprezentate frecvenele pe care sau realizat msurtorile; iar cele cu albastrureprezint pseudodistanele.

linia 12:

linia 13 i 14: prima linia reperzint momentul primei observaii, cea de-a doua liniemomentul ultimei observaii.

2013 12 06 00 00 0.0000000 GPS TIME OF FIRST OBS2013 12 06 23 59 30.0000000 GPS TIME OF LAST OBS

linia 15 i 16 :cifra 16 reprezint numrul secundelor de salt, iar 31 numrul de satelii.

16 LEAP SECONDS31 # OF SATELLITES

de la linia 17 pn la linia 47 sunt cei 32 de satelii fiecare cu numrul su caracteristic.


22/3922

liniile 48, 49, 50 sunt linii cu comentarii suplimentare.

BIT 2 OF LLI FLAGS DATA COLLECTED UNDER A/S CONDITION COMMENT

SNR is mapped to RINEX snr flag value [1-9] COMMENT

Lx: >= 25dBHz -> 1; 26-27dBHz -> 2; 28-31dBHz -> 3 COMMENT32-35dBHz -> 4; 36-38dBHz -> 5; 39-41dBHz -> 6 COMMENT42-44dBHz -> 7; 45-48dBHz -> 8; >=49dBHz -> 9 COMMENT

linia 51: ne este dat epoca - an, lun, zi, or, minute, secunde iar 0 dacepoca anterioarnu a fost ntrerupt (13 12 06 00 00 0.0000000 0) dup care avemnumarul sateliilor(7) urmai de identificatorii lor, fiecare identificator trebuie s conin o liter urmat dedou cifre cuprinse ntre 1 i 99 (exemplu G17= GPS 17).

13 12 06 00 00 0.0000000 0 7G04G12G15G17G24G26G28

iar de la linia 52 n jos sunt calculate ambiguitile.

Fiierele conin un numr mare de pagini i de aceea am ales s le micorez pn unde ncepecalculul ambiguitilor.

2. Staia de referiEgletons (EGLT) - Frana .

Figura 1.16 Poziia staiei Egletons

Informaii generale despre aceast staie:

Proiect: EUREF

Data propus: 15.10.2013

Nume: Egletons (EGLT)

ara: Frana.

Poziia aproximativ (coordonate) :

X= 4483373.66 m

Y= 160636.51 m

Z= 4519408.93 m

Latitudinea (N cu +) = +452412.07

Longitudinea (E cu +) = +0020307.18

Elevaia (m, elipsa) = 667.0 m

Date de contact: [email protected]


23/3923

Tipul de receptor activ la ora actual:

Figura 1.17 Datele receptorului activ

Acest receptor a fost instalat n 2001 prima datdup care a fost schimbat n 2008, iar de atunciaproape n fiecare an l-au tot schimbat pn au ajuns la cel reprezentat n figura de mai sus.

Figura 1.18 Datele receptoarelor vechi

Tipul antenei:

Figura 1.19 Datele antenei active

La aceast staie prima anten instalat a fost n 2001de tip LEIAT504, dup care n 2008 altade

tip LEIAT504GG.

Antena arat ca n cele dou figuri de mai jos:

Figura 1.20 Antena


24/3924

Cei patru senzori umiditatea, presiunea, temperatura i radiometrul vaporilor de ap nu sunt

instalai.

Analiznd toate datele de mai sus, va rezulta :

Graficile caracteristice acestei staii sunt:

a)

tipul de observaii:

Aici putem vedea o legtur ntre observaiile minime i cele maxime pentru aceast staie.

Diagrama ne arat modul n care observarea staiei se ncadreaz n limita admis prin

compararea cu alte staii.

Figura 1.21 Tipul de observaii

n diagrama de mai jos, putem vedea observaiile fcute cu o zi nainte de stocarea datelor,acestea fiind marcate cu un punct albastru. Mai putem vedea deviaia standard de observaii nultimele 30 de zile iar cu rou sunt simbolizatecelelalte staii dinproiect.

Figura 1.22 Tipul de observaii fcute cu o zi nainte


25/3925

b) efectul de multipath:

n aceste 2 diagrame putem vedea multipath MP1 i MP2, marcat cu un punct albastru.

Figura 1.23 Efectul multipath

n cele 2 imagini de mai jos "skyplots" putem vedea MP1 multipath i MP2 pentru pentrufiecare satelit.

Figura 1.24 Skyplots

c) ntreruperile de msurtori:

Din diagram, putem vedea raportul de observaii, comparativ cu ntreruperile de msurtori,acestea fiind marcate cu un punct albastru.

Figura 1.25 ntreruperile de msurtori


26/3926

d) efectul ionosferic:

n imagini sunt reprezentatentrziereai derivatul ionosferic pentru fiecare satelit.

Figura 1.26 Efectul ionosferic

e) semnal zgomot:

ns aici ne este afiatraia de zgomot semnal pe frecvenele L1 i L2 pentru fiecare satelit.

Figura 1.27 Raia zgomot semnal

Vom descrca i analiza fiierede date furnizate de sistemele GNSS, n acest caz va fi :

Mixed Observation : GPS+GLONASS+GALILEO+SBAS.

Fiierul arat astfel:

2.11 OBSERVATION DATA M (MIXED) RINEX VERSION / TYPEteqc 2012Jun6 20131207 00:09:02 UTCPGM / RUN BY / DATELinux 2.4.21-27.ELsmp|Opteron|gcc -static|Linux x86_64|=+ COMMENTteqc 2012Jun6 20131206 01:02:16UTCCOMMENTteqc 2012Jun6 IGN-RGP 20131206 01:02:14UTCCOMMENTBIT 2 OF LLI FLAGS DATA COLLECTED UNDER A/S CONDITION COMMENTEGLT MARKER NAME10032M001 MARKER NUMBERAutomatic Institut Geographique National OBSERVER / AGENCY1830169 LEICA GR25 3.01 REC # / TYPE / VERS4611118296 TRM57971.00 NONE ANT # / TYPE

4483373.8660 160636.3020 4519408.7430 APPROX POSITION XYZ0.0000 0.0000 0.0000 ANTENNA: DELTA H/E/N

1 1 WAVELENGTH FACT L1/221 L1 L2 C1 P1 P2 D1 D2 S1 S2# / TYPES OF OBSERV


27/3927

L5 C5 D5 S5 L7 C7 D7 S7 L8# / TYPES OF OBSERVC8 D8 S8 # / TYPES OF OBSERV

30.0000 INTERVALDefaultJobName COMMENTDefaultUserDiscription COMMENTProject creator: COMMENTSNR is mapped to RINEX snr flag value [0-9] COMMENTL1 & L2: min(max(int(snr_dBHz/6), 0), 9) COMMENT

16 LEAP SECONDSForced Modulo Decimation to 30 seconds COMMENT

2013 12 6 0 0 0.0000000 GPS TIME OF FIRST OBS

13 12 6 0 0 0.0000000 0 23G12G30G25G14G18G22G15G24G17G26R23R22R05R24R12R03R04R15R13R14E11S20S26

109918435.542 8 85650738.02947 20916776.080 20916768.2602010.089 1566.304 49.550 47.100

110635348.269 8 86209333.71647 21053207.260 21053200.060-876.338 -682.862 49.250 47.200

126146659.739 7 98296116.91746 24004910.080 24004905.9803391.723 2642.901 42.850 38.950 94200441.203 8

24004909.540 2532.771 51.100

129863359.612 6 101192212.76446 24712176.020 24712168.1003453.452 2691.002 41.250 36.300

123353679.982 6 96119709.01445 23473428.060 23473420.760-1854.253 -1444.872 40.450 35.300

124992947.659 7 97397057.53345 23785367.060 23785356.500

-391.064 -304.728 44.150 35.650

114079767.035 8 88893305.53247 21708654.420 21708647.680-2679.948 -2088.271 48.850 46.000

106664333.703 8 83115054.39948 20297541.680 20297536.460209.779 163.464 49.100 49.050 79651950.340 8

20297539.620 156.636 53.300

120808823.659 7 94136727.82446 22989151.380 22989143.560-1306.158 -1017.786 45.950 40.950

130133178.864 6 101402484.64545 24763512.740 24763506.520

-4003.924 -3119.942 37.500 30.800

113141599.310 8 87999016.525 7 21150624.260 21150623.7001127.882 877.241 48.000 46.000

122377255.986 7 95182315.353 6 22925380.060 22925379.140-2756.687 -2144.092 45.450 41.350

119458171.449 7 92911903.468 7 22347120.340 22347119.3002166.576 1685.113 44.550 42.900

119857385.617 7 93222406.142 7 22413933.820 22413931.8004073.154 3168.008 44.900 43.350

130227310.661 5 101287950.866 5 24378810.720 24378811.580-3222.096 -2506.076 35.300 32.550


28/3928

122469381.885 6 95253946.606 7 22878311.180 22878309.060-4304.177 -3347.695 39.200 43.350

111678164.828 7 86860779.323 7 20855110.240 20855106.980-1669.149 -1298.229 47.300 46.150

125871909.942 6 97900394.910 6 23555211.620 23555212.6403073.009 2390.119 41.650 40.350

109787601.396 7 85390387.025 7 20559676.900 20559676.100-1780.543 -1384.867 46.300 47.400

106763812.088 7 83038545.134 7 20028614.180 20028615.6401239.731 964.235 44.200 43.150

137377582.121 7 26142079.740-325.417 47.900 102587160.556 8

26142077.820 -243.069 49.150 105263330.790 826142073.860

-249.369 50.600 103925245.877 7 26142076.540 246.21843.900

200740772.918 7 38199694.720-3.566 44.450

200544383.504 7 38162128.920-21.252 44.150

Unde :

linia 1 :

2.11 OBSERVATION DATA M (MIXED) RINEX VERSION / TYPE

linia 2 reprezint numele programului care creaz fiierul, numele ageniei n care secreazi data la care a fost creat acesta.

teqc 2012 Jun6 20131207 00:09:02 UTCPGM / RUN BY / DATE

linia 3, 4, 5 i 6 reprezint linii de comentarii suplimentare.

Linux 2.4.21-27.ELsmp|Opteron|gcc -static|Linux x86_64|=+ COMMENT

teqc 2012Jun6 20131206 01:02:16UTC COMMENT

teqc 2012Jun6 IGN-RGP 20131206 01:02:14UTC COMMENT

BIT 2 OF LLI FLAGS DATA COLLECTED UNDER A/S CONDITION COMMENT

linia 7 i 8 reprezint numele i numrul staiei.

EGLT MARKER NAME

10032M001 MARKER NUMBER


29/3929

linia 9 :

Automatic Institut Geographique National OBSERVER / AGENCY

linia 10 reprezint numrul,tipul, versiunea receptorului, precum i versiunea software.

1830169 LEICA GR25 3.01 REC # / TYPE / VERS

linia 11 reperzint numrul i tipul antenei.

4611118296 TRM57971.00 NONE ANT # / TYPE

linia 12 reprezint poziia aproximativ a staiei.

4483373.8660 160636.3020 4519408.7430 APPROX POSITION XYZ

linia 13 reprezint nlimea si excentricitile antenei.

0.0000 0.0000 0.0000 ANTENNA: DELTA H/E/N

linia 14: Cifrele 1 1 reprezint factorul lungimii de und impus de softul respectiv pe celedou benzi de frecven L1 i L2

1 1 WAVELENGTH FACT L1/2

linia 15,16 i 17 reprezint:

cifra 21 reprezint numrul total de observaii;

L1, L2, L5, L7 i L8 sunt benzi de frecven;

C1,C5,C7, C8 i P1, P2 suntcoduri;

D1, D2, D5, D7 i D8 sunt pseudodistane;

S1, S2, S5, S7 i S8 sunt semnalele zgomot.

21 L1 L2 C1 P1 P2 D1 D2 S1 S2# / TYPES OF OBSERV

L5 C5 D5 S5 L7 C7 D7 S7 L8 # / TYPES OF OBSERV

C8 D8 S8 # / TYPES OF OBSERV

linia 18 repezint intervalul observaiilor n secunde.

30.0000 INTERVAL

linia 19,20,21, 22, 23 reprezint linii suplimentare de comentarii.

DefaultJobName COMMENTDefaultUserDiscription COMMENT

Project creator: COMMENT


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SNR is mapped to RINEX snr flag value [0-9] COMMENT

L1 & L2: min(max(int(snr_dBHz/6), 0), 9) COMMENT

linia 24 : cifra 16 reprezint numrul secundelor de salt.

16 LEAP SECONDS

linia 25 reprezint o linie cu comentarii suplimentare.

Forced Modulo Decimation to 30 seconds COMMENT

linia 26 reprezint timpul primei observaii: anul, luna, ziua, ora, minutul, secund i tipulde sistem (GPS).

2013 12 6 0 0 0.0000000 GPS TIME OF FIRST OBS

linia 27 : ne este dat epoca - an, lun, zi, or, minute, secunde iar 0 dac epocaanterioar nu a fost ntrerupt(13 12 06 00 00 0.0000000 0) dup care avemnumarulsateliilor(23) urmaide identificatorii lor, fiecare identificator trebuie s conin o literurmat de dou cifre cuprinse ntre 1 i 99 ( G= GPS, R= GLONASS, E = GALILEO iS= SBAS).

13 12 6 0 0 0.0000000 0 23G12G30G25G14G18G22G15G24G17G26R23R22

R05R24R12R03R04R15R13R14E11S20S26

linia 28 reperzint calculul ambiguiti pentru 8 satelii (numrul ncercuit cu roureprezint numrul de satelii).

Iar de la linia 28 n jos merg doar aceste calcule pentru un anumit numr de satelii.

Concluzie

Cele dou staii GNSS, Bacu i Egletons din Romnia i respectiv Frana sunt clasificate dup

EUREF ca staii din clasa A, ceea ce nseamn c pot fi folosite ca staii de ncredere pentru

densificarea reelei de staii.

Staia Bacu primete date doar de la sistemul GPS (NAVSTAR), pe cnd cealalt staie

primete date de la mai multe sisteme de navigaie i anume GPS, GLONASS, GALILEO i

SBAS.


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Datele Rinex care sunt furnizate de sistemele GNSS pentru staia de referin Bacu sunt:

GPS Navigation - date de navigare GPS;

GPS only Obs - numai date de observaii GPS.

Iar pentru staia de referin Egletons, datele Rinex sunt de tipul "Mixed Observation" adic

observaiile sunt mixte avnd mai multe sisteme de navigaie la baz.Datele sunt disponibile la fiecare or i zilnic pentru ambele staii.

Calitatea de urmrire a datelor pentru :

staia Egletons la 00i de 88 % iar pentru 150 de 100 %

staia Bacu la 00i de 83 % iar pentru 150 de 97 %

Datele meteo pentru staia din Frana nu sunt accesibile datorit faptului c nu au instalai cei 4

senzori care sunt caracteristici ambelor staii i anume: umiditatea, presiunea, temperatura i

radiometrul vaporilor de ap. Staia Bacu are acces la acest tip de date.Fiecare din staii sunt dotatecu un anumit tip de echipament i anume:

Staia Egletons :

tipul receptorului - LEICA GR25;

antena - TRM57971.00;

sistemele satelitare: GPS, GLONASS, GALILEO.

Staia Bacu:

tipul receptorului - LEICA GRX1200PRO: antena - LEIAT504;

sistemele satelitare: GPS.

Comparnd cele dou staii de referin, staia Bacu este mai "tnr" deoarece antena a fost

instalat n 2005 odat cu receptorul. Receptorul a tot fost instalat i dezinstalat, ns ultima lui

instalare a avut loc n 28 ianuarie 2013.

Ceea ce la staia de referin Egletons este invers, adic este mai "btrn". Antena a fost

instalat prima dat n 2001, dup a urmat n 2008 o dezinstalare i o nou instalare, iar din 2012

nu a mai fost atins. ns receptorul a tot suferit modificri,iar ultima sa instalare a avut loc pe

15 octombrie 2013.

Din punctul meu de vedere staia de referin din Frana este mai puternic, mai de ncredere

datorit faptului c primete date de la 4 sisteme de navigaie (GPS, GLONASS, GALILEO i

SBAS). Deasemenea staiaBacu este de remarcat prin faptul c are instalaicei 4 senzori care

nu permit modificarea poziieistaiei.


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2 INTERPRETAREA FIIERELOR DE NAVIGAIE FOLOSIND SOFTUL

JAVAD RINEX VIEWER

Pentru nceput voi descrie softul cu care am lucrat i anume softul JAVAD Rinex Viewer sau

JAVAD GNSS Rinex Viewer.Javad Rinex Viewer ajut utilizatorii de a analiza formatatele fiierelor RINEX.

Rinex Viewer are urmtoarele caracteristici:

- interfaa simpl n utilizare;

- gsete erorile dac este cazul;

- accept date GPS, GLONASS, Galileo, SBAS, evenimente externe i ocupaii.

Interfaa softului arat astfel:

Figura 2.1 Interfaa JAVAD RINEX

Unde :

C1, C2, C5, P1 i P2 sunt coduri ;

L1, L2 i L5 sunt benzi de frecven;

D1, D2 i D5 sunt frecvene Doppler pe L1, L2 i L5;

S1, S2 i S5 sunt puterile brute a semnalului, valoarea SNR;

GPS, GLO - GLONASS, SBAS, GAL - GALILEO sunt sisteme de navigaie.

Pentru interpretare am ales staia IGEO din Chiinu. Am descrcat fiierul de date Rinex cu

tipul "GPS Navigation" de pe GNSS Data Center.


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Figura 2.2 Fiierul de date RINEX

Dup care am dezarhivat fiierul i am trecut la utilizarea softului Javad.

Primul pas: Am dat "Input file ", am ales fiierul i am dat open.

Figura 2.3 ncrcarea fiierul de date RINEX

Pasul doi: Fiierul a fost ncrcat dup care am dat "Scan" pentru scanarea lui i au fost afiate

urmtoarele rezultate:

Figura 2.4 Datele sumare


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Ne sunt afiate epocile, sateliii, msurtorile, existena erorilor, tipul de fiier adic Navigation

Files GPS i efemeridele.Pentru vizualizarea erorilor o s dm View Errors:

Figura 2.5 Vizualizare erori

Pasul trei: nchidem vizualizarea erorilor si trecem la vizualizarea efemeridelor. Acestea le

gsim accesnd meniul View / Ephemerides.

Figura 2.6 Accesare meniul View pentru a vizualiza efemeridele


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Acestea vor arata aa cum putem observa din imaginea de mai jos:

Figura 2.7 Vizualizarea efemeridele la general

Din imagine observm efemeridele GPS pe direcia Sud-Vest (sv=1) pentru un numr de satelii

( N=1). Ne sunt afiate date generale despre data la care au fost stocate informaiile, ora,

semnalele emise i tipul de satelit.

Dup care mergem la cea dea doua subdiviziune i anume "Clock and Ephemeris":

Figura 2.8 Ora i data efemeridelor


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La or ne sunt afiate: problemele de dat i ceas care s-au ntlnit; timpul de referin n

secunde;precizia utilizat; starea satelitului; numrul sptmnii; ntrzierea diferenial estimat

n secunde. Ne sunt afiai coeficienii polinomiali i la efemeride ne este dat timpul de referin

n secunde precum i problemele ntlnite.

Mergem la cea dea treia subdiviziune i anume "Keplerian" :

Figura 2.9 Parametrii orbitei Kepleriene

Din imagine putem observa parametrii orbitei Kepleriene, acetea fiind:

semiaxa mare;

excentricitatea;

timpul de referin;

longitudinea nodului ascendent;

unghiul de nclinaie;

argumentul perigeului.

Ultima subdiviziune este "Correction" :

Figura 2.10 Corecii


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Aceste coreciile sunt pentru parametrii orbitei Kepleriene.

Pasul patru: Din meniul View mai putem vizualiza i parametrii ionosferici :

Figura 2.11 Vizualizarea parametrilor ionosferici

Aceti parametri sunt alfa i beta.

Figura 2.12 Parametrii ionosferici

alfa i beta

nchiznd aceast subdiviune,revenim la faza iniial:

Figura 2.13 Interfaa rinex

Dup care dm "Exit" i ieim din program.


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3 Bibliografie

1. http://igs.bkg.bund.de

2.

www.epncb.oma.be

3.

http://javad.com/jgnss/products/software/rinex_viewer.html

4.

http://javad-gnss-inc1.software.informer.com/

5.

http://www.epncb.oma.be/_networkdata/siteinfo4onestation.php?station=CO

ST
http://igs.bkg.bund.de/http://www.epncb.oma.be/http://javad.com/jgnss/products/software/rinex_viewer.htmlhttp://javad.com/jgnss/products/software/rinex_viewer.htmlhttp://www.epncb.oma.be/http://igs.bkg.bund.de/


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Documents

Analiza Fișierelor de date Furnizate de Sistemele GNSS