![]() Several terse online references state that the nutation anomaly was managed by the use of "Conscan" or CONSCAN, for example GIF animation of what the game seems to have been like: Question: Was the nutation problem of the Ulysses spacecraft successfully mitigated? If so, how was it implemented? ¹The expression for the “nutation forcing function” is given in section 5.1 Figure 1 shows the predicted nutation forcing function during the original occurrence of nutation in 1990 and for the periods during 1994- 19 when nutation was predicted to return. These factors are combined into a “nutation forcing function,”¹ which is an accurate measure of the severity of the problem at a given time. A study of the phenomenon revealed that it was due to solar heating effects on the spacecraft axial boom, and that it was a function of three geometrical factors: the Sun-spacecraft-Earth angle, the Sunspacecraft distance, and the spacecraft shadowing of the boom. The spin-stabilized Ulysses spacecraft experienced a significant nutation level for a period of 46 days shortly after launch. ![]() The nutation situation is mentioned in the introduction of that paper, but it seems like a fairly complex problem requiring a fairly complex solution. Which lead me to 1, 2 and 3, links connected to the Ulysses Nutation Game website which while hosted by JPL, also contain an ESA logo.Īlso I found the paper ARGOS: Attitude Reckoning from Ground Observable Signals, a System to Monitor Ulysses Nutation and Thruster Firings from Variations of the Spacecraft Radio Signal
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |