ALHATAutonomous precision Landing and Hazard Detection Avoidance Technology
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ALHAT has to enable precision landing - touching down within 30m (98.
NASA Johnson Space Center-based ALHAT project manager Chirold Epp presented its progress at the American Institute of Aeronautics and Astronautics' Space 2008 conference in San Diego in September.
Previous ALHAT documents have shown an 18km altitude decision point for powered descent.