Magnitude of 64-m elevation axis movements due to alidade temperature changes
Abstract
In projected very-long baseline interferometry (VLBI) work a reference point for 64-m antennas is the intersection of the elevation and azimuth axes. A minimum-level effort at DSS 14 to determine the magnitude of the effect of diurnal changes in the temperature of the alidade legs on the height of the elevation axis is described. The thermal expansion between the lowest recorded temperature -3 C (27 F) and the highest, 36 C (97 F), over the period covered was 8.9 mm (0.35 in.).
- Publication:
-
The Deep Space Network
- Pub Date:
- December 1976
- Bibcode:
- 1976dsn..nasa...41H
- Keywords:
-
- Antennas;
- Axes (Reference Lines);
- Azimuth;
- Deep Space Network;
- Elevation Angle;
- Temperature Effects;
- Diurnal Variations;
- Interferometry;
- Thermal Expansion;
- Communications and Radar