The third French satellite was the first of the Diamant series proper (A-1 being just a test capsule). D-1A, named Diapason (`waveband') after launch, carried a Doppler beacon transmitter for geodetic measurements, as well as a solar cell damage experiment. . The 19 kg satellite was reported to be still operating a year after launch. It was built by MATRA for CNES.
|1966 Feb 17||0838?||Launch by Diamant A||HMG Brigitte|
|0841:40||Orbit insertion||118.51 499 x 2738 x 34.0|
|1967 Feb||Still operating|