Fundamental Technologies

Voyager LECP Pages

Attachment C
Navigation Data Block Format for Launch Period

Word Description Units Type
1 SCE GMT Year of Navigation Data Block years, AD I
2 SCE GMT Day of Navigation Data Block day of year I
3 SCE GMT Hour of Navigation Data Block hour of day I
4 SCE GMT Minute of Navigation Data Block minute of hour I
5 SCE GMT Second of Navigation Data Block second of
minute		 I
6 SCE GMT Millisecond (msec) of
Navigation Data Block		 msec of
second		 I
7-12 Cartesian State of S/C, Earth Centered,
Earth Mean Ecliptic and Equinox of 1950.0		 km
km/sec		 E
13-18 Cartesian State of S/C, Sun Centered,
Earth Mean Ecliptic and Equinox of 1950.0		 km
km/sec		 E
19-24 Cartesian State of S/C, Jupiter Centered,
Earth Mean Ecliptic and Equinox of 1950.0		 km
km/sec		 E
25-30 Cartesian State of S/C, Saturn Centered,
Earth Mean Ecliptic and Equinox of 1950.0		 km
km/sec		 E
31-36 Cartesian State of Earth, Sun Centered,
Earth Mean Ecliptic and Equinox of 1950.0		 km
km/sec		 E
37-42 Cartesian State of Jupiter, Sun Centered,
Earth Mean Ecliptic and Equinox of 1950.0		 km
km/sec		 E
43-48 Cartesian State of Saturn, Sun Centered,
Earth Mean Ecliptic and Equinox of 1950.0		 km
km/sec		 E
49 Range Earth - S/C km E
50 Range Earth - Sun km E
51 Range Sun - S/C km E
52 Range Jupiter - S/C km E
53 Range Saturn - S/C km E
54 Range Sun - Jupiter km E
55 Range Sun - Saturn km E
56 Angle Earth - Sun - S/C deg E
57 Angle Sun - S/C - Earth (Celestial Cone
Angle of Earth)		 deg E
58 Angle Sun - Earth - S/C deg E
59 Angle Jupiter - Sun - S/C deg E
60 Angle Sun - S/C - Jupiter (Celestial Cone
Angle of Jupiter)		 deg E
61 Angle Sun - Jupiter - S/C deg E
62 Angle Saturn - Sun - S/E deg E
63 Angle Sun - S/C - Saturn (Celestial Cone
Angle of Saturn)		 deg E
64 Angle Sun - Saturn - S/C deg E
65 Celestial Clock Angle of Earth deg E
66 Celestial Clock Angle of Jupiter deg E
67 Celestial Clock Angle of Saturn deg E
68-69 Right Ascension and Declination of S/C,
Earth Centered, Earth Mean Equator and
Equinox of 1950.0		 deg E
70-71 Right Ascension and Declination of Sun,
Earth Centered, Earth Mean Equator and
Equinox of 1950.0		 deg E
72-73 Right Ascension and Declination of Jupiter,
Earth Centered, Earth Mean Equator and
Equinox of 1950.0		 deg E
74-75 Right Ascension and Declination of Saturn,
Earth Centered, Earth Mean Equator and
Equinox of 1950.0		 deg E
76-77 Right Ascension and Declination of S/C,
Jupiter Centered, Jupiter True Equinox,
and Equator of Date		 deg E
78-79 Right Ascension and Declination of Sun,
Jupiter Centered, Jupiter True Equinox,
and Equator of Date		 deg E
80-81 Right Ascension and Declination of Earth,
Jupiter Centered, Jupiter True Equinox,
and Equator of Date		 deg E
82-83 Right Ascension and Declination of Io,
Jupiter Centered, Jupiter True Equinox,
and Equator of Date		 deg E
84-85 Right Ascension and Declination of S/C,
Saturn Centered, Saturn Mean Equinox,
and Equator of 1950.0		 deg E
86-87 Spares    
88-89 Spares    
90-91 Celestial Latitude and Longitude of S/C,
Sun Centered, Earth True Equinox,
and Ecliptic of Date		 deg E
92-93 Celestial Latitude and Longitude of Earth,
Sun Centered, Earth True Equinox,
and Ecliptic of Date		 deg E
94-95 Celestial Latitude and Longitude of Jupiter,
Sun Centered, Earth True Equinox,
and Ecliptic of Date		 deg E
96-97 Celestial Latitude and Longitude of Saturn,
Sun Centered, Earth True Equinox,
and Ecliptic of Date		 deg E
98-99 Right Ascension and Declination of S/C
Sun Centered, Sun True Equinox,
and Equator of Date		 deg E
100-101 Right Ascension and Declination of Earth,
Sun Centered, Sun True Equinox,
and Equator of Date		 deg E
102-103 Right Ascension and Declination of Jupiter,
Sun Centered, Sun True Equinox,
and Equator of Date		 deg E
104-105 Right Ascension and Declination of Saturn,
Sun Centered, Sun True Equinox,
and Equator of Date		 deg E
106 Hour Angle of Jupiter System III Prime
Meridian, Jupiter Centered, Jupiter True
Equinox and Equator of Date		 deg E
107-126 Spares    

Figure C-1. Earth Mean Ecliptic and Equinox of 1950.0 (ECL50), Launch SEDR State Vectors

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Last modified 12/6/02, Tizby Hunt-Ward
tizby@ftecs.com