Citation
Abstract
Connected-element interferometer (CEI) holography is a technique that enables holography on DSN antennas at the operational frequency bands. If one DSN antenna is tracking a spacecraft with a powerful enough signal, it could be used as the reference for an antenna whose surface has to be measured. This opportunistic scheme is hampered by the impact of tropospheric turbulence in the resulting holographic map. With Cartesian grid holography, this means that measurements can only be done at night, when the troposphere is mostly calm. That reduces the chances in which CEI holography can be done. In the present report, a polar grid is used to reduce the impact of the troposphere. In this way, CEI holography can be done at any time an antenna is available, regardless of the status of the troposphere. Simulations and actual measurements done using polar sampling are presented and compared with Cartesian sampled maps.
Keywords
Details
- Volume
- 42-241
- Published
- May 15, 2025
- Pages
- 1–17
- File Size
- 10.5 MB