Talk:Phobos 1

Creation of Article
I noticed that the Phobos 1 spacecraft did not have its own article, while the Phobos 2 spacecraft did. I did some research and found some reputable information that will hopefully shed some light on the probe.

I apologize for any errors I made. This is the first article I've created and I tried to follow the guidelines as closely as possible. --NuclearHistoryStudent (talk) 02:22, 10 April 2016 (UTC)

Another reason for failure
I was told that the reason for failure was that a routine switch of receivers was incorrectly done. Instead of "Turn on receiver B; turn off receiver A," the command sequence sent was "Turn off receiver A; turn on receiver B." The second command was somehow not received. The article states that there was a program to "proofread" commands to be sent, but that it was not used. JPL uses two sets of programs. The first, called SEQGEN, generates sequences to be sent to the spacecraft. This is essentially a compiler for a special-purpose language. The second, called COMSIM, simulates commands to be executed by the spacecraft computer. In addition, it checks for catastrophic actions ordered, such as "Don't point the camera at the sun, you idiot!" and "Don't grind the scan platform gears against the stops, you idiot!" I was told that the Soviet space program (or at least the Phobos project), did not have an equivalent of COMSIM, or at least if it did, it was not nearly as comprehensive. (I briefly worked on a component of COMSIM for Voyager, called the "Scan Platform Operational Program Set" or SCANOPS.)

Paper on the solar imaging with a lot of authors
Images of the Sun Obtained with the TEREK X-Ray Telescope on the Spacecraft PHOBOS-1

©Geni (talk) 16:40, 26 April 2020 (UTC)