Risat-1

 2012-017A

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IRS derived FRISAT.

Box + Hex prism + 2 pan + SAR antenna ISRO First Radar imaging satellite. 3-50 m res, 10-240 km swath. Launch by PSLV-XL, the first time this variant had flown from FLP and its first polar mission. Mass 1858 kg, of which 950 kg is the SAR payload. Launch to to 480 x 480 km x 97.6 deg. Onboard prop raised orbit to 536 km, 0600 LT SSO.

RISAT
Date	Time	Event	Orbit
2012 Apr 26	0016	Launch by PSLV-XL	SDSC FLP
		T+0:25 PSOM AL ignition
		T+1:10 PSOM GL sep
		T+1:32 PSOM AL sep
		T+1:50 PS1 sep	-5900? x 90? x 46?
		T+1:50 PS2 ignition
		T+3:20 Heat shield sep
		T+4:21 PS2 sep	-4600? x 180? x 86?
		T+4:22 PS3 ign.
		T+5m? PS2 apogee around equator?
		PS3 MECO	-3510 x 452 x 96.0?
	0024	T+8:37 PS3 sep 446 km 5.8819 km/s
		T+11:02? PS4 burn
		T+19:38? Stage 4 MECO
	0036?	T+20:25? Stage 4 sep
2012 Apr 26			94.07 465 x 481 x 97.6
2012 Apr 28		Orbit raise	95.44 530 x 549 x 97.6
2012 May 1		Begin imaging ops
2012 Aug 6			95.43 538 x 540 x 97.6

Payload:

• SAR C-band 5.350 GHz 6.29x2.09x0.22m SAR antenna, with 50m res, 223 km swath (CRS)