US 12,135,385 B2
System and method for transmitting information from synthetic aperture radar satellite to client receiver
Pekka Laurila, Espoo (FI)
Assigned to ICEYE OY, Espoo (FI)
Filed by ICEYE OY, Espoo (FI)
Filed on Aug. 31, 2022, as Appl. No. 17/900,274.
Application 17/900,274 is a continuation of application No. 15/685,349, filed on Aug. 24, 2017, granted, now 11,460,535.
Prior Publication US 2022/0413089 A1, Dec. 29, 2022
Int. Cl. G01S 7/00 (2006.01); G01S 7/527 (2006.01); G01S 13/90 (2006.01)
CPC G01S 7/006 (2013.01) [G01S 7/527 (2013.01); G01S 13/90 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for transmitting information from a synthetic aperture radar satellite, the method comprising:
retrieving synthetic aperture radar raw data stored in a data storage and forming the information using the synthetic aperture radar raw data;
modulating a synthetic aperture radar transmission signal using the information and a modulation method to generate a modulated synthetic aperture radar transmission signal where the information is in the modulation of the modulated synthetic aperture radar transmission signal;
determining a transmission timing, at the synthetic aperture radar satellite or in tasking of the synthetic aperture radar satellite, for transmitting the modulated synthetic aperture radar transmission signal from the synthetic aperture radar satellite to a client receiver taking into consideration a spatial location of the client receiver, a spatial location of the synthetic aperture radar satellite, and a directional pattern of a transmission antenna of the synthetic aperture radar satellite; and
transmitting, from the synthetic aperture radar satellite, the modulated synthetic aperture radar transmission signal according to the determined transmission timing,
wherein,
the directional pattern of the transmission antenna comprises a main lobe and at least one side lobe,
the determining a transmission timing comprises determining (a) when the client receiver is in an area covered by the main lobe or the at least one side lobe and (b) when a signal strength of the modulated synthetic aperture radar transmission signal is above a threshold value.