Ume 1

 1976-019A

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NASDA and the Radio Research Lab (RRL) developed the Ionospheric Sounding Satellite (ISS), a 135 kg, 0.82 m long, 0.94m diameter spacecraft with a swept frequency topside sounder with 36.8m and 11.4m span dipole antennae covering a range from 0.5 to 148 MHz. Prime contractor was Mitsubishi. The satellite was named Ume (Japanese apricot blossom) after launch. Launch was southeast from TNSC at azimuth 115 deg (corresponding to a 38 deg inclination); a yaw burn in second stage changed inclination to 70 deg.

Ume
Date	Time	Event	Orbit
1976 Feb 29	0330	Launch N-I 2	TNSC
	0333	St 1 sep	-6000? x 200? x 38?
		Fairing sep
	0335	St 2 burn 4:30
	0339	St 2 cutoff	-3200 x 998 x 51.4
	0340	St 3 burn, circ
	0341?	St 3 sep	105.2 994 x 1013 x 69.7
1976 Mar		Electrical malfunction
1976 Aug 2		End of tx

Payload:

• TOP Swept frequency topside sounder, 36.8m., 11.4m dipoles; 0.5-148 MHz

• PIC Ion mass spectrometers