Kodama

 2002-042B

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DRTS, a Data Relay Test Satellite for data relay and intersatellite communications, was built by Mitsubishi. DRTS was named Kodama ('echo'). Originally two satellites were to be launched, but DRTS-E was cancelled in 2001 and only DRTS-W was retained.

DRTS was a box + 2 panels + antenna, mass 2800 kg launch, 1500 kg BOL. 1300 kg dry. Size 2.2 x 2.4 x 2.2m with 17m span. The 1700N IHI COMETS UPS was downrated to 500N for a gentler burn. Ka/S band 3.6m dia dish. At 90E. Kodama was launched in 2002 by H2A. The third apogee firing failed due to oxidizer depletion. RCS firings later got Kodama to GEO at 90.8E.

Carried out the High Speed Data Relay Experiment, 240 Mbit/s; High Accuracy Acquisition and Tracking Tech Expt., for onboard acquisition of the satellites that DRTS relays from and to; and the Communications Network Experiment, with time allocation methods on user satellites. Kodama relayed some Earth images from Midori-II; after that satellite failed, Kodama had to wait for the launch of Daichi.

DRTS
Date	Time	Event	Orbit
2002 Sep 10	0820	Launch by H2A 2024	TNSC
		T+1:10 SSB 1-2 on
		T+1:46 SRB-A sep
		T+1:47 SSB 3-4 sep
		T+2:24 SSB 1-2 sep
		T+4:10 upper fairing sep
		T+6:28 MECO (earlier than this)
		T+6:36 Stage 1 sep
		T+6:42 SES-1
		T+12:58 SECO-1 (later)
		T+13:48 USERS sep
		T+16:18 Lower fairing sep (2 pieces + adapter)
		T+26:17 SES-2
		T+28:42 SECO-2
		T+29:18 DRTS sep
2002 Sep 11	0021	LAM1 Apo 2, 60 min burn	780.99 7414 x 36013 x 12.0
2002 Sep 12	0221	LAM2 Apo 4, 60 min burn
2002 Sep 13	0126	LAM3 Apo 5; failed after 103s of 204s
2002 Sep 14		AOCS burn to correct for GEO
2002 Sep 15		Deploy antennas
2002 Sep 19			1446.16 35936 x 36029 x 0.1 GEO 134.4E-2.5W/d
2002 Oct 6			1441.04 35832 x 35934 x 0.1 GEO 93.4E-1.2W
2002 Oct 10			1436.56 35777 x 35814 x 0.1 GEO 90.8E
2002 Oct 11		On station
2003 Jan 10		Declared operational
2003 May 9			1436.11 35779 x 35794 x 0.1 GEO 90.8E
2003 Oct 29		Safemode after solar flare
2003 Nov 25		Operations resumed
2006 Jan		Tests with Daichi scheduled
2006 Aug 6			1436.11 35774 x 35799 x 0.1 GEO 90.7E
2017 Jul 28			1436.07 35778 x 35794 x 5.1 GEO 90.9E
2017 Jul 31		Orbit raise
2017 Aug 3		Orbit raise	1450.33 35971 x 36167 x 5.1

Insat 3C

 2002-002A

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Mass 2750 kg launch, 1050 kg dry. Size 2.8 x 1.7 x 2.0 m with 15.4 m span. This was the last planned Ariane 42L launch, and used a trajectory with a high initial perigee of 570 km. 3C will be placed at 74E.

Insat 3C was colcated with Kalpana 1 at 74E.

\imps{2.5}{images/02002A}

Insat 3C
Date	Time	Event	Orbit
2002 Jan 23	2347	Launch by Ariane 42L	CSG ELA2
		T+2:19 PAL sep
		T+3:13 St 1 sep
		T+3:16 St 2 MES
		T+3:39 Fairing sep
		T+5:25 St 2 sep
		T+5:30 St 3 MES
		T+12:15	-2900 x 507
2002 Jan 24	0005	T+18:30 MECO
	0007	T+20:52 Insat 3C sep
		T+22:52 end of V147 mission
2002 Jan 24			638.54 580 x 35790 x 4.0
2002 Jan 25		LAM-1	817.02 9363 x 35780 x 1.7
2002 Jan 27		LAM-2	1015.11 18365 x 35794 x 0.8
2002 Jan 30	?	LAM-3	1428.37 35490 x 35779 x 0.19 GEO 67E+2E/d
2002 Feb 1	Deployment of solar panels
2002 Feb 9		LAM	1435.90 35760 x 35804 x 0.1 GEO 74E
2002 Jul 20			1436.11 35767 x 35805 x 0.0 GEO 74.0E
2004 Jul 21			1436.10 35771 x 35802 x 0.0 GEO 74.0E
2006 Aug 3			1436.09 35765 x 35807 x 0.1 GEO 74.0E
2017 Jan 12			1436.10 35764 x 35808 x 0.3 GEO 74.0E
2017 Jan 13		Move out
2017 Feb 27		Move in	1436.08 35756 x 35815 x 0.4 GEO 93.5E
2017 Jul 16			1436.17 35777 x 35798 x 0.7 GEO 93.3E

Endurance : My Year in Space, A Lifetime of Discovery

 https://welib.org/md5/f4c615d6b5c2a2c2fb2c83a98ede7451