Interkosmos 21

 1981-011A

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Interkosmos-21, AUOS-Z-R-P-IK, was launched on 1981 Feb 6 by Kosmos-3M from Plesetsk. The satellite carried out studies of ocean temperature, pollution and biological activity, as well as atmospheric thickness, magnetospheric plasma and magnetic fields. Instruments were provided by the USSR, the DDR, and Rumania.

Mass was 995 kg.

Interkosmos-21
Date	Time	Event	Orbit
1981 Feb 6	0800	Launch by 11K65M (Kosmos-3M)	NIIP-53
	0802	S3 burn
	0808?	T+8m? S3 MECO-1
	0833?	T+33m? S3 MES-2
			94.5 475 x 515 x 74.0
1982 Apr		End of transmissions
1982 Jul 7		Reentered

Payload:

• DDR/SSSR spectrometer

• SSSR microwave radiometer

• SGDD test ( data collection system)

• Rumania/SSSR SG-R2 magnetometer