1978-018A
The second NASDA/RRL Ionospheric Sounding Satellite, ISS-b, was launched in Feb 1978 as part of the International Magnetospheric Study (IMS). It was similar to the first Ume and this time operated well. The apogee was a little higher than previously, presumably an overburn of stage 3.
| Ume 2 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1978 Feb 16 | 0400 | Launch by N-1 | TNSC |
| 0403 | St 1 sep | -6000? x 200? x 38? | |
| Fairing sep | |||
| 0405 | St 2 burn 4:30 | ||
| 0409 | St 2 cutoff | -3200 x 1020? x 51.4 | |
| 0410 | St 3 burn, circ | ||
| 0411? | St 3 sep | 107.3 975 x 1224 x 69.4 | |
| 1978 Mar 18 | Checkout phase | ||
| 1978 Apr 15 | Operational | ||
| 1978 Jun 12 | Interrupted | ||
| 1978 Aug 11 | Operational | ||
| 1978 Dec 15 | Reduced observations | ||
| 1979 Jan 10 | Operational | ||
| 1981 May | Still operating | ||
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