DBCP Workshop October 2006 ARGOS-4 CNES ARGOS SYSTEM PRESENTATION - CNES Responses to CLS User survey Synthesis of NOAA User consultation Anticipated Argos-4

DBCP Workshop October 2006 ARGOS-4 CNES

ARGOS SYSTEM PRESENTATION - CNES

• Responses to CLS User survey• Synthesis of NOAA User consultation• Anticipated Argos-4 needs• ARGOS-3 :• * System Heritage• * Commissioning• ARGOS-4 System : Preliminary Overview


RESPONSES TO CLS USER SURVEY


SURVEY CONTEXT

1604 surveyed customers 238 replies Replies per application


USER SATISFACTION

32%

55%

6%

2%

0%5%

Biologists

38%

45%

10%

1%

1%

5%Meteo/Ocean

24%

33%10%

2%

0%

31%

43%

36%

11%

1%0%9%

Argos services

Client support

GLOBAL


ARGOS SYSTEM METEO / OCEAN (1/2)

System reliability

52%41%

6%

0%

1%

0%

# satellites - Timeliness

28%

47%

17%

6%

1%

1%Data volume

24%

33%

22%

15%

1%

5%

Global Global

Main users Main users


SYNTHESIS OF NOAA USER CONSULTATION


QUESTIONNAIRE

• Distribution and Coverage How many DCPs? Where?

• Timeliness How often transmit/receive to each DCP? Latency requirements? Direct read-out?

• Link Reliability Importance for transmit Importance for receive

• Throughput How much data on each transmit /

receive?• Geolocation

Use of Doppler geolocation Use of GPS

• Portability Antenna size? Volume and mass?

• Future Tradeoffs

• Argos DCS study report was issued on december 7,2005

• Questionnaire was issued to 33 people

• 20 responses received :– 5 ocean– 11 biologists– 4 DCP manufacturers


CONCLUSIONS

• Survey responses indicate that next-generation of Argos DCS should focus on– Improving DCP transmit performance: increased data volumes with

reduced size, mass and power

– Improve Doppler geolocation to < 150m with a target of <50m

• An order-of-magnitude improvement in data volumes and cost would make Argos DCS attractive to a new class of users

• Argos system is not adapted to applications generating large amount of data per hour


ANTICIPATED ARGOS-4 NEEDS


17032

10781

4467

16290

2000

4000

6000

8000

10000

12000

14000

16000

18000

jan

v-96

jan

v-97

jan

v-98

jan

v-99

jan

v-00

jan

v-01

jan

v-02

jan

v-03

jan

v-04

jan

v-05

jan

v-06

Total ARGOS

Total Science

Total Fishing

Total Sensitive Use

NUMBER OF ACTIVE PLATFORMS IN THE SYSTEM

Average growth > 12% per year


NEED FOR ADDITIONAL CAPACITY

Need for more than 15 Erlang

capacity


ARGOS USER NEEDS FOR ARGOS 4

• KEEP COMPATIBILITY WITH ARGOS-2 & ARGOS-3 PMTs

• INCREASE AUTONOMY & REDUCE SIZE- Tx power drain decrease: factor 2

- Rx power drain : constant for increased capacity

- Size & weight decrease : factor 2

• INCREASE DCP DENSITY:- Doubled number of platforms among which 25% are @ 4800 bps

- Increase data volume transmission per pass : up to 100 kb per pass

• IMPROVE LOCATION : 50 to 150 m

• BETTER TIME RESPONSE : Average < 30 min

• INCREASE DOWNLINK DATA VOLUME : > 1,2 kbps


SATELLITE TRANSITION SCHEDULE


ARGOS-4 SYSTEM: PRELIMINARY OVERVIEW (1/10)

Average timeresponse (min)

Maximum Holeper day (hours*)

55 2.5 < MH < 4.7

66 2.9 <MH <3.7

• BASIC SYSTEM CONSTELLATION- Reference constellation: NOAA-K, L, M & N

- NPOESS-C1, C2 and METOP (3 main guaranteed orbits)

* at equator

Time response (min)

0

10

20

30

40

50

60

70

0 20 40 60 80 100

latitude (°)

NPOESS-C1, C2 & METOP

NOAA-K, L, M & N




Maximum Holeper day (hours)

55 2.5 < MH < 4.7

66 2.9 <MH <3.7

• IMPROVEMENT IDEAS- Satellite orbit control

- NPOESS-C1, C2 and METOP + 1 equatorial orbit satellite

* at equator



55 2.5 < MH < 4.7

66 2.9 <MH <3.7

30 1.6 < MH < 1.7

Time response (min)

0

10

20

30

40

50

60

70

0 20 40 60 80 100

latitude (°)

NPOESS-C1, C2 & METOP+ Equatorial






55 2.5 < MH < 4.7

66 2.9 <MH <3.7

30 1.6 < MH < 1.7

14 0.7 < MH < 0.8

• IMPROVEMENT IDEAS- Satellite orbit control

- NPOESS-C1, C2 and METOP + 2 equatorial orbit satellites

* at equator

Time response (min)

0

10

20

30

40

50

60

70

0 20 40 60 80 100

latitude (°)

NPOESS-C1, C2, METOP +2 Equatorial

NPOESS-C1, C2 & METOP+ Equatorial



Data throughput• STD + NG/400 bps: low power Tx• HD/4800 bps: 10 msgs - 50 kbits per pass

Tx power: 5 W

Capacity: • 12 processing units (3 HD)• 110 kHz frequency bandwidth

Two-way link (400 bps)

ARGOS 3

ARGOS 4

Data throughput• STD + NG/400 bps: low power Tx• HD/4800 bps: 30 msgs -140 kbits per pass

Tx power: 3 W

Capacity: • 40 processing units (10 HD)• 400 kHz frequency bandwidth (TBC)• Processor speed x 30

Two-way link (3 x 400 bps TBC)

ARGOS-4 SYSTEM: PRELIMINARY OVERVIEW


ARGOS-4 SYSTEM: PRELIMINARY OVERVIEW

• ARGOS-4 PLANNING (TBC):

- System study until spring of 2007

- Phase A study: until end of 2007

- Phase B: beginning of 2008

- First Flight Model provided in 2011

Documents

DBCP Workshop October 2006 ARGOS-4 CNES ARGOS SYSTEM PRESENTATION - CNES Responses to CLS User survey Synthesis of NOAA User consultation Anticipated Argos-4