Fundamental Technologies

Voyager LECP Pages

Attachment F
Navigation Data Block Format for Saturn Encounter

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, Saturn Centered, Earth Mean Ecliptic and Equinox of 1950.0 km
km/sec		 E
25-30 Cartesian State of S/C, Titan 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 Saturn, Sun Centered, Earth Mean Ecliptic and Equinox of 1950.0 km
km/sec		 E
43-48 Cartesian State of Earth, Saturn Centered, Earth Mean Ecliptic and Equinox of 1950.0 km
km/sec		 E
49-54 Cartesian State of Titan, Saturn Centered, Earth Mean Ecliptic and Equinox of 1950.0 km
km/sec		 E
55-60 Cartesian State of S/C, Saturn Centered, Saturn Mean Orbit and Prime Meridian in Sun Direction km
km/sec		 E
61-66 Cartesian State of Titan, Saturn Centered, Saturn Mean Orbit and Prime Meridian in Sun Direction km
km/sec		 E
67-72 Cartesian State of S/C, Saturn Centered, Saturn True Prime Meridian and Equator of Date km
km/sec		 E
73-75 Cartesian State of Titan, Saturn Centered, Saturn True Prime Meridian and Equator of Date km E
76-77 Saturn Latitude and Longitude of S/C deg E
78-79 Saturn Latitude and Longitude of Titan deg E
80 Range  Earth - S/C km E
81 Range  Earth - Sun km E
82 Range  Sun - S/C km E
83 Range  Saturn - S/C km E
84 Range  Titan - S/C km E
85 Range  Sun - Saturn km E
86 Range  Saturn - Titan km E
87 Angle  Earth - Sun - S/C deg E
88 Angle  Sun - S/C - Earth (Celestial Cone Angle of Earth) deg E
89 Angle  Sun - Earth - S/C deg E
90 Angle  Saturn - Sun - S/C deg E
91 Angle  Sun - S/C - Saturn (Celestial Cone Angle of Saturn) deg E
92 Angle  Sun - Saturn - S/C deg E
93 Celestial Clock Angle of Earth deg E
94 Celestial Clock Angle of Saturn deg E
95-96 Celestial Clock and Cone Angles of Titan deg E
97-98 Right Ascension and Declination of S/C, Earth Centered, Earth Mean Equator and Equinox of 1950.0 deg E
99-100 Right Ascension and Declination of Sun, Earth Centered, Earth Mean Equator and Equinox of 1950.0 deg E
101-102 Right Ascension and Declination of Saturn, Earth Centered, Earth Mean Equator and Equinox of 1950.0 deg E
103-104 Right Ascension and Declination of S/C, Saturn Centered, Saturn True Equinox and Equator of Date deg E
105-106 Right Ascension and Declination of Sun, Saturn Centered, Saturn True Equinox and Equator of Date deg E
107-108 Right Ascension and Declination of Titan, Saturn Centered, Saturn True Equinox and Equator of Date deg E
109-110 Celestial Latitude and Longitude of S/C, Sun Centered, Earth True Equinox and Ecliptic of Date deg E
111-112 Celestial Latitude and Longitude of Earth, Sun Centered, Earth True Equinox and Ecliptic of Date deg E
113-114 Celestial Latitude and Longitude of Saturn, Sun Centered, Earth True Equinox and Ecliptic of Date deg E
115 Time To (-)/From(+) Saturn Periapsis Passage sec E
116-126 Spares    

Figure F-1. Earth Mean Ecliptic and Equinox of 1950.0 (ECL50), Saturn Encounter State Vectors

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