Fundamental Technologies

Voyager LECP Pages

Attachment G
Pointing Vector Data Block Format

Word Description Units Type
1 SCE GMT Year of Pointing Vector Data Block years, AD I
2 SCE GMT Day of Pointing Vector Data Block day of year I
3 SCE GMT Hour of Pointing Vector Data Block hour of day I
4 SCE GMT Minute of Pointing Vector Data Block minute of hour I
5 SCE GMT Second of Pointing Vector Data Block second of
minute		 I
6 SCE GMT Millisecond (msec) of
Pointing Vector Data Block		 msec of
second		 I
7 FDSC MOD16 Count Value of Pointing Vector Data Block binary counts I
8 FDSC MOD60 Count Value of Pointing Vector Data Block binary counts I
9 Pitch Limit Cycle Angle (Rotation about the S/C X-Axis with the positive direction determined by the right hand rule) deg E
10 Yaw Limit Cycle Angle (Rotation about the S/C Y-Axis with the positive direction determined by the right hand rule) deg E
11 Roll Limit Cycle Angle (Rotation about the S/C Z-Axis with the positive direction determined by the right hand rule) deg E
12-14 Cartesian Unit Vector of the S/C X-Axis, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
15-17 Cartesian Unit Vector of the S/C Y-Axis, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
18-20 Cartesian Unit Vector of the S/C Z-Axis, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
21-22 Celestial Clock and Cone Angles of CRS LET C Boresight deg E
23-25 Cartesian Unit Vector of the CRS LET C Boresight, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
26-27 Celestial Clock and Cone Angles of CRS LET A Boresight deg E
28-30 Cartesian Unit Vector of the CRS LET A Boresight, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
31-32 Celestial Clock and Cone Angles of CRS LET D Boresight deg E
33-35 Cartesian Unit Vector of the CRS LET D Boresight, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
36-37 Celestial Clock and Cone Angles of CRS LET B Boresight deg E
38-40 Cartesian Unit Vector of the CRS LET B Boresight, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
41-42 Celestial Clock and Cone Angles of CRS TET Boresight deg E
43-45 Cartesian Unit Vector of the CRS TET Boresight, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
46-47 Celestial Clock and Cone Angles of CRS HET 1 Boresight deg E
48-50 Cartesian Unit Vector of the CRS HET 1 Boresight, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
51-52 Celestial Clock and Cone Angles of CRS HET 21* Boresight deg E
53-55 Cartesian Unit Vector of the CRS HET 21 Boresight, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
56-57 Celestial Clock and Cone Angles of CRS HET 22* Boresight deg E
58-60 Cartesian Unit Vector of the CRS HET 22 Boresight, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
61-62 Celestial Clock and Cone Angles of the LECP Axis of Rotation deg E
63-65 Cartesian Unit Vector of the LECP Axis of Rotation, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
66-67 Celestial Clock and Cone Angles of the PLS Axis of Symmetry deg E
68-70 Cartesian Unit Vector of the PLS Axis of Symmetry, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
71-72 Celestial Clock and Cone Angles of the PLS Lateral Detector Boresight deg E
73-75 Cartesian Unit Vector of the PLS Lateral Detector Boresight, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
76-77 Celestial Clock and Cone Angles of the HGA Boresight deg E
78-80 Cartesian Unit Vector of the HGA Boresight, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
81-82 Celestial Clock and Cone Angles of the PPS Optic Axis deg E
83-85 Cartesian Unit Vector of the PPS Optic Axis, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
86-87 Celestial Clock and Cone Angles of the UVS Airglow Optic Axis deg E
88-90 Cartesian Unit Vector of the UVS Airglow Optic Axis, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
91-92 Celestial Clock and Cone Angles of the UVS Occultation Optic Axis deg E
93-95 Cartesian Unit Vector of the UVS Occultation Optic Axis, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
96-97 Celestial Clock and Cone Angles of the IRIS Optic Axis deg E
98-100 Cartesian Unit Vector of the IRIS Optic Axis, S/C Centered, Earth Mean Ecliptic and Equinox of 1950.0 dim E
101 Continuation Bit:  =1, another pointing vector block follows; =0, last pointing vector block in this logical record dim I
102 Azimuth deg E
103 Elevation deg E
104 Twist deg E
105-126 Spares    

* HET 2, Positions 1 and 2, i.e., HET 21 and HET 22

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