Connection and validation of narrow-band delta VLBI phase observations
Abstract
Narrow-band differential very long baseline interferometry required phase connections between consecutive scans. An efficient computer aided scheme for this purpose is presented. This scheme is an iteration process alternating between a grand fit on many scans and integer quantization of the phase shift cycles to be assigned to the scans. Only linear simultaneous equations of a few unknowns need to be solved. A simulation analysis indicates that faultless phase connection can be expected when there is no localized systematic noise. When systematic noise of moderate level exists, the possible incorrect phase connection can be detected and connected for by comparing the connected phases from the two alternating observations, after removing the residual diurnal effects.
- Publication:
-
The Deep Space Network
- Pub Date:
- August 1979
- Bibcode:
- 1979dsn..nasa...13W
- Keywords:
-
- Computerized Simulation;
- Deep Space Network;
- Very Long Base Interferometry;
- Diurnal Variations;
- Flow Charts;
- Iterative Solution;
- Linear Equations;
- Phase Shift;
- Program Verification (Computers);
- Random Walk;
- Spacecraft Tracking;
- Space Communications, Spacecraft Communications, Command and Tracking