STSAT-2

 2009-F03

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The KSLV-1 launched 2009 from KHSC (Ko-Hoeung Space Center) 127.54E 34.43N, renamed Naro Space Center, on Oenaro I., S Chola province with Science Technology Satellite 2,

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2

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mass 100 kg.

Naro-1/KSLV-1 stage 1 is Angara, with 170t thrust and 140t mass, 2.9m dia. Stage 2 is Hanwha Corp solid motor described as '8 ton class', derived from the smaller-diameter KSR-1 motor. Total height 33m dia 2.9m. Stage 2 length possibly 7.8m, motor is around 2.0m long around 1.0m diameter.

STSat-2 box + 2 panels by KAIST/SatRec, 0.6 x 0.6 x 0.93m span 1.8? Orbit will be 300 x 1500 km x 80 deg.

One of two 300 kg fairings failed to separate. The second stage separation happened late, at 327 km.

Estimate of masses: Pre burn: stage 2 full is 1440 full 200 empty (a complete guess, factor 2 at best). Payload is 100 kg + 300 kg fairing half. Engine is 80 kN for 44s, guess Isp = 290s. Then dV = 2.4 km/s?

Korea time is GMT+9.

Launch expected 1700 KT, 0800 UTC, 0400 EDT Aug 19.

STSAT 2 plan
Date	Time	Event	Orbit
2009 Aug 19		Launch by Naro-ho	Naro Space Center
		T+20s Pitch, 0.9 km
		T+55s 7.4 km
		T+3:35 Fairing sep 177 km
		T+3:49 Stage 1 MECO
		T+3:52 Stage 1 sep 196 km, range 316 km
		Coast
		T+6:49 Stage 2 MES, 303 km, range 1052 km
		T+7:33 Stage 2 MECO
		T+9:00 Stage 2 sep	306 x 306 km
		Stage 1 impact near Phillipines

STSAT 2 actual
Date	Time	Event	Orbit
2009 Aug 25	0800	Launch by Naro-ho	Naro Space Center
		T+20s Pitch, 0.9 km
		T+55s 7.4 km
		T+3:35 Fairing half 1 sep 177 km
		T+3:49 Stage 1 MECO
		T+3:52? Stage 1 sep
		Coast	-5800? x 340? x 80
		T+6:49? Stage 2 MES, 360 km, range 1052 km
		T+7:33 Stage 2 MECO
	0809:00	Stage 2 sep at 327 km
	0809:00	Fairing half 2 sep
	0811	STSAT apogee at 387 km, 6.2 km/s	-3100? x 387 x 80.0
	0812?	Stage 1 impact near Phillipines
	0818?	Reentry near New Guinea?

Payload:

• DREAM Dual channel Radiometers for Earth and Atmosphere Monitoring 23.8, 37 GHz receivers.

• PPT Pulsed plasma thruster

• LRA Satellite laser ranging array 20 muNs, Isp = 800s