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1. (WO2019066698) A METHOD FOR DETERMINING THE BASE LINE FOR A SYNTHETIC APERTURE OF A SAR USING GNSS
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Pub. No.: WO/2019/066698 International Application No.: PCT/SE2018/050956
Publication Date: 04.04.2019 International Filing Date: 19.09.2018
IPC:
G01S 19/39 (2010.01) ,G01S 19/51 (2010.01)
G PHYSICS
01
MEASURING; TESTING
S
RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
19
Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
38
Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
39
the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
G PHYSICS
01
MEASURING; TESTING
S
RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
19
Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
38
Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
39
the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
42
Determining position
51
Relative positioning
Applicants:
SAAB AB [SE/SE]; 581 88 Linköping, SE
Inventors:
DAMMERT, Patrik; SE
HELLSTEN, Hans; SE
Agent:
ZACCO SWEDEN AB; Box 5581 Valhallavägen 117N 114 85 Stockholm, SE
Priority Data:
1751209-629.09.2017SE
Title (EN) A METHOD FOR DETERMINING THE BASE LINE FOR A SYNTHETIC APERTURE OF A SAR USING GNSS
(FR) PROCÉDÉ DE DÉTERMINATION DE LA LIGNE DE BASE D'UNE OUVERTURE SYNTHÉTIQUE D'UN SAR À L'AIDE D'UN GNSS
Abstract:
(EN) The present invention relates to a method for determining a synthetic aperture of a synthetic aperture radar, SAR, system using information from a global navigation satellite system, GNSS, which includes a plurality of satellites each transmitting a radio frequency signal comprising a unique pseudo random number, PRN. The method comprises: receiving the radio frequency signal from a group of satellites in the GNSS, determining a first maximum correlation peak of the PRN of the received radio frequency signal from each satellite in the group of satellites, determining the phase shift between the first determined maximum correlation peak and a second determined maximum correlation peak of a received PRN from the same satellite at a later time, for each satellite in the group of satellites, determining a line-of-sight, LOS, movement of the SAR system relative each of the satellites in the group of satellites by means of the determined phase shift for each satellite in the group of satellites, and determining a synthetic aperture using the LOS movement relative each satellite in the group of satellites.
(FR) La présente invention concerne un procédé de détermination d'une ouverture synthétique d'un système radar à ouverture synthétique, SAR, utilisant des informations provenant d'un système mondial de navigation par satellite, GNSS, qui comprend une pluralité de satellites émettant chacun un signal de radiofréquence comprenant un nombre pseudo-aléatoire unique, PRN. Le procédé comprend : la réception du signal radiofréquence provenant d'un groupe de satellites dans le GNSS, la détermination d'un premier pic de corrélation maximale du PRN du signal de radiofréquence reçu en provenance de chaque satellite du groupe de satellites, la détermination du décalage de phase entre le premier pic de corrélation maximal déterminé et un second pic de corrélation maximal déterminé d'un PRN reçu en provenance du même satellite à un moment ultérieur, pour chaque satellite du groupe de satellites, la détermination d'un déplacement de ligne de visée, LOS, du système SAR concernant chacun des satellites du groupe de satellites au moyen du décalage de phase déterminé pour chaque satellite du groupe de satellites, et la détermination d'une ouverture synthétique à l'aide du déplacement de LOS concernant chaque satellite du groupe de satellites.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)