Contact: HANSPETER KUHLEN CEPT Coordinator AI1.12

Email: hanspeter.kuhlen@airbus.com

ASIA-PACIFIC TELECOMMUNITY The 5th Meeting of the APT Conference Preparatory Group for WRC-15 (APG15-5)

Document APG15-5/INF-06

27 July – 1 August 2015, Seoul, Republic of Korea 27 July 2015

CEPT

WRC-15 AGENDA ITEM 1.12: ESS + 600MHZ

Agenda Item 1.12 (WRC-15) EESS+600MHz 5th Meeting of the APT Conference Preparatory Group for World Radiocommunication Conference 2015 (APG15-5) Seoul, Republic of Korea 27th July – 1st August 2015 Hanspeter Kuhlen (Germany) CEPT Coordinator AI 1.12

Agenda Item 1.12

8.4-8.5 GHz

RR 5.337 Aeronautical RNS RR 5.468 8.5-8.75 GHz FS + MS RR 5.469 8.5-8.75 GHz MS + RNS RR 5.470 8.75-8.85 GHz RNS RR 5.471 8.825-8.850 GHz 9.0-9.2 GHz RNS RR 5.472 8.85-9.0 GHz 9.2-9.225 GHz RNS RR 5.473 8.825-8.850 GHz 9.0-9.2 GHz RNS RR 5.473A RR 5.474 9.2-9.5 SART

RR 5.427 RR 5.474 RR 5.475 RR 5.475A RR 5.475B RR 5.476A RR 5.477 RR 5.478 RR 5.478A RR 5.478B

RR 5.477 9.8-10.0GHz FS in some countries RR 5.478 RNS in some countries RR 5.478A 9.8-9.9 GHz only for EESS > 500MHz RR 5.478B FS has priority over EESS RR 5.479 9.975-10.025 GHz sec meteorological sat RR 5.480 10.45-10.5 GHz FS in some countries RR 5.481 10.45-10.5 GHz FS in some other countries

8.7 9.3 9.9 10.5 GHz

600 MHz 600 MHz RAS SRS (passive) EESS (passive)

10.6-10.7 GHz

SRS

8.65 8.75 8.85 8.9 9.0 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 10.0 10.1 10.2 10.3 10.4 10.5

GHz Method A1 + A2

RLS

ARNS ARN

Mar RNS RNS

RNS

EESS

SRS

FS

MS

ARS

RNS

Potentially affected service allocations as per ITU Radio Regulations (Edition 2012)

RADIO LOCATION (RLS)

Fixed Service (FS)

ARNS

RADIO NAVIGATION (RNS)

Amateur Radio Service (SAS)

Mobile Service (MS) R1+ R3

SPACE RESEARCH (SRS) (active)

EARTH EXPLORATION-SATELLITE EESS (active)

potential extension

EESS (active) and SRS (active)

Current allocation in RR no. 5

Method B1 + B2

Method C

Method A2 includes a PFD Limit

Method D (No change)

Method B2 includes another PFD Limit Method B1 => CEPT ECP

Current RR and AI 1.12 Methods in CPM-Report

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Agenda Item 1.12 Issue: to consider an extension of the current worldwide allocation to the Earth exploration-satellite (active) service in the frequency band 9 300-9 900 MHz by up to 600 MHz within the frequency bands 8 700-9 300 MHz and/or 9 900-10 500 MHz, in accordance with Resolution 651 (WRC-12)

Preliminary CEPT position: CEPT supports the allocation of additional radio frequency spectrum of 600 MHz in the frequency bands 9 200-9 300 MHz and 9.9-10.4 GHz with a primary status to the Earth Exploration-Satellite Service (active). CEPT supports, that stations in the Earth exploration-satellite service (active) shall not cause harmful interference to, nor claim protection from, stations operating in the Radio Determination Services allocated in the same frequency bands. The extension band should be only used by SAR systems requiring more than 600 MHz bandwidth. CEPT supports, that provisions for the protection of Fixed and Mobile Services from EESS (active) need to be implemented, as appropriate. CEPT supports, that the Space Research Service operating in the band 8 400 - 8 500 MHz and the Radio Astronomy Service operating in the band 10.6 - 10.7 GHz will be protected through the implementation of mitigation techniques, and, if not sufficient, through operational coordination, as described in Recommendations ITU-R RS.2065 and RS.2066.

CEPT Coordinator : Mr Hanspeter Kuhlen (Germany)

Agenda Item 1.12 ITU-R Responsible Group: ITU-R Study Group 7 - Working Party 7C Contributing Groups: WP 7B (SRS), WP 7D (RAS), WP 5A (MS, AS), WP 5B (RDS), WP 5C (FS) Documentation in ITU-R:

CPM Report; Chapter 2 - AI 1.12 Method A1: EESS (active) extension in 9 900-10 500 MHz; Method A2: same as Method A1 but with additional pfd limit for the protection of FS; CPG15-7 => Method B1: EESS (active) extension in 9 200-9 300 MHz and 9 900-10 400 MHz Method B2: same as Method B1 but with different pfd limit for the protection of FS; Method C: EESS (active) extension in 9 200-9 300 MHz and 9 900-10 100 MHz Method D: NOC

Supporting Documentation Report ITU-R RS.2247 Justifying the spectrum demand for next generation hi-res EESS Synthetic Aperture Radar Recommendation ITU-R RS.2043 Describing EESS SAR Characteristics reference used in sharing studies

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Protection of RAS and SRS from out-of-band emissions Documentation in ITU-R:

Report ITU-R RS.2308 - Compatibility studies on out-of-band emissions into SRS and RAS Recommendation ITU-R RS.2066 - Protection of RAS from unwanted EESS SAR emissions Recommendation ITU-R RS.2065 - Protection of SRS from unwanted EESS SAR emissions

Protection of incumbent services

Documentation in ITU-R: Report ITU-R RS.2314 - Sharing studies of EESS SAR with FS, MS, AS, and ARS

Studies show compatibility with all services (simple mitigation for rare cases of very high FS link elevation)

Report ITU-R RS.2313 - Sharing studies with terrestrial radars (RNS and RLS) Studies show compatibility when realistic radar processing gain is taken into account (however, PGs are not disclosed for proprietary reasons) Protection through footnote making EESS(active) secondary to RDS

Agenda Item 1.12

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CEPT Position taken at CPG15-7 (1-5 June 2015, Porto, Portugal) Draft CEPT Brief Agenda Item 1.12 CPG15(15)026 Annex03_PTA - AI 1.12 - Draft CEPT Brief ECP Agenda Item 1.12 CPG15(15)026 Annex14_PTA - AI 1.12 - Draft ECP European Common Proposal (ECP) proposes

RR Article 5 table entry of a primary allocation to the EESS (active) in the frequency bands 9 200-9 300 MHz and 9 900-10 400 MHz Only for SAR transmissions using more than 600 MHz and up to 1200MHz chirp bandwidth Secondary to RDS (because an unrealistic assumption of only 0 dB processing gain in the ITU-R studies) – see Report ITU-R RS.2313 for more details Protection of RAS and SRS from OOBE by Recommendations incorporated by reference (footnote)

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Agenda Item 1.12

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Next generation of EESS Synthetic Aperture Radar (SAR) Imaging

High resolution SAR images (<25cm) are key to detect long-term micro changes of landscapes, coastal lines (dykes), volcanoes, glaciers, but also buildings and bridges. This long-term information can support preventive actions of worldwide relevance

Monitoring impact of global warming Natural disaster warning (trends) and support of post disaster analyses and relief planning Geoscience Large scale construction support Cadastre

=> Spectrum requirements are provided in Report ITU-R RS.2274

High-resolution mode “SAR-4 (1200MHz chirp)” only in Spotlight Mode Transmission “chirp” is a fast sweep of an unmodulated carrier over 1200MHz Chirp over 50μsec followed by 100μsec silence (=> duty cycle) Transmissions only occur when images are taken (< 7sec)

Detailed SAR characteristic is given by Recommendation ITU-R RS.2043

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Future resolution

Topographic / Cadastral Mapping / Infrastructure Integrity SAR 1200 MHz: From 1m down to 0.25m Resolution

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Agenda Item 1.12

TThank You for Your kind attention For further information please contact: Mr. Hanspeter Kuhlen, CEPT Coordinator Agenda Item 1.12 (WRC-15) Airbus DS GmbH D-81663 Munich, Germany Tel.: +49 89 607 23542 Mob: +49 162 2949 766 Fax: 49 89 607 21023 Hanspeter.kuhlen@airbus.com

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Detailed EESS SAR Imaging Geometry used for sharing studies

20°

55°

Φ Incident Angle Ψ Grazing Angle

Off-Nadir Angle or Look Angle

(Antenna beam orientation)

vsat = 7630m/s

ψ

Spot area 5x5km²

δR δAT

Satellite track

Antenna cone 1.13° (or elevation beam width) Ant cross-cone 0.53° (or azimuth beam width)

DAT

DR

Sub-satellite ground track or along track or azimuth direction

Rf

Rn

NADIR

SAR antenna Phase centre

φ

Pixel resolution

Symmetrical case for left side of satellite

Simplified flat spot area

h = 510 km

Cross track or range or elevation direction

φ

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