FIRSTMOVE – end of mission

First-MOVE On-Board Computer Damaged

As we posted on December 21st 2013, we are not receiving data beacons from First-MOVE anymore. In contrast to the nominal mode in which CW beacons and AX.25 beacons alternate every 60 seconds, we are now hearing only CW beacons every 60 seconds. After trying many different approaches to reset our on-board computer via telecommands we re-analyzed our current options again last week. This analysis resulted in the conclusion, that the on-board software has sustained irreparable damage. The fact that we are receiving CW beacons every 60 seconds indicates, that both the transceiver and the power supply are functioning properly. For the transceiver to return to the 60 second CW beacon mode, it has to be power cycled, since this mode cannot be activated by the on-board software. This means that there was definitively an interruption in the power supply. In case of an interruption, the computer should deactivate the 60 second CW beacon mode as the first task during the boot sequence. As this has obviously not happened, the only conclusion is, that the computer is not getting through the entire boot sequence, probably because it was damaged due to an erroneous write process on the memory chip. Since there is no way to upload new software to First-MOVE we see no possibility to continue the mission and perform the planned experiments. It seems that First-MOVE has become inactive after a very short lifetime. We will still receive the CW beacons, but we will not hear anything but his name.

We would like to take this opportunity to thank all the people who went on this long journey and helped us. Especially the experience of strangers all around the world trying and often succeeding in tracking our satellite has made us very happy. Thank you for your efforts and help!

We will now try to compile all of the experience we have gained, write it down and pass it on to the next generation so a longer and more successful mission can be performed in the future.

Claas Olthoff

FIRSTMOVE beacon

09:15 UTC
MV1b 0x6C 0xE7 0x34 0x01 0xF7 0x48 0x44 0x01 0xD5 0x04 0xC0 0x09 0x21 0x03 0x48 0x03 0x37 0x03 0x02 0x00 0x07 0x00 0x22 0xE7 0x07 0x00 0xC1 0x24 0x41 0x62 0x60 0x60 0xA1 0x00 0x00 0x00 0x00 0x00 0x00 0x20 0x66 0x60 0xA2 0x62 0x20 0x60 0x20 0x12 0x73 0x06 0x40 0x00 0x02 0x02 0x00 0x04 0x21 0x12 0x10 0x05 0x40 0x31 0x71 0x22 0x36 0x30 0x02 0x02 0x00 0x06 0x00 0x00

Battery Temp: 6.5C
Battery Voltage: 8.3V