Active Solar Aerodynamic Or Gravity Gradient

C PRIMARILY SPECIAL PURPOSE-LESS EXPERIENCE WITH THESE THAN WITH THOSE j LISTED ABOVE; CHARACTERISTICS ARE HIGHLY MISSION DEPENDENT; SOME i 1 SYSTEMS MAY SEE MORE USE IN THE FUTURE AS FURTHER EXPERIENCE ISGAINEOj

'REFERS TD ANY DEVICE THAT MAY BE USEO IN A PROCESS TO EXCHANGE ANGULAR MOMENTUM WITH THE SPACECRAFT BODV.

'REFERS TD ANY DEVICE THAT MAY BE USEO IN A PROCESS TO EXCHANGE ANGULAR MOMENTUM WITH THE SPACECRAFT BODV.

Calendar time in the usual form of date and time is used only for input and output, since arithmetic is cumbersome in months, days, hours, minutes, and seconds. Nonetheless, this is used for most human interaction with attitude systems because it is the system with which we are most familiar. Problems arise even with date and time systems, since time zones are different throughout the world and spacecraft operations involve a worldwide network. The uniformly adopted solution to this problem is to use the local time corresponding to 0 deg longitude as the standard absolute time for events anywhere in the world or in space. This is referred to as Universal Time (UT), Greenwich Mean Time (GMT), or Zulu (Z), all of which are equivalent for the practical purposes of data interpretation. The name

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