Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.cosmos.ru/da/interball/tail/attitude/software/aareadme.txt Дата изменения: Mon Oct 30 14:53:01 1995 Дата индексирования: Sat Dec 22 14:35:04 2007 Кодировка: Поисковые слова: mercury program

attid1.for is a FORTRAN subroutine for attitude processing
attid2.c is a C version


stucture of attitude data files
--------------------------------------------------------------

1. Data are arranged in the files, with filenames corresponding
to telemetry sessions sequence.

2. Data format is ASCII.

3. Format of a first line in a file (FORTRAN format specifications):
1X,I2 - number in a sequence in the file (0)
1X,A2 - code of a satellite (AZ, TZ... )
1X,A1 - type of telemetry (S/C - SSNI/STO )
1X,I1 - telemetry session (1/2 - direct/memory)
1X,I5 - number of a session (YYDDD)
1X,I1 - number of a part of session
1X,I4,1X,I2,1X,I2,1X,F7.3 - YYYY MM DD TS - beginning of a session, UT
1X,I4,1X,I2,1X,I2,1X,F7.3 - YYYY MM DD TS - end of a session, UT

Note: TS - thousands of seconds in a day

4. Format of data structures
1X,I2 - number in a sequence in the file (1...)
1X,I4,1X,I2,1X,I2,1X,F7.3 - YYYY MM DD TS - beginning of an interval, UT
1X,F7.3 - TS - duration of an interval
14(1X,F) - X[12], Z[2] - initial data for attitude determination

Note: TS - thousands of seconds in a day


subroutine input and output parameters
--------------------------------------

TS - time in thousands of sec relative to beginning of the interval
(negative values supported).

U1,U2 - direction in the S/C frame of reference, degrees (input)
U1 - angle between vector and X S/C axis (polar angle)
U2 - angle in the YZ S/C plane (anticlockwise)

dir(1..2..3) - corresponding unit vector in the GSE frame (output)

X,Z - arrays with the initial data set.