Mathematics – Probability
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1156..237h&link_type=abstract
IN: Airborne reconnaissance XIII; Proceedings of the Meeting, San Diego, CA, Aug. 7-9, 1989 (A90-48601 22-06). Bellingham, WA, S
Mathematics
Probability
Expert Systems, Onboard Data Processing, Planetary Surfaces, Spacecraft Landing, Terrain Analysis, Aerospace Safety, Mars Landing, Mars Sample Return Missions, Terminal Guidance, Unmanned Spacecraft
Scientific paper
Autonomous lunar and planetary landers require a sensor for real time hazard detection during the terminal descent phase when landing in rough, hazardous terrain. The sensor must establish surface feature data from which on-board data processors can identify safe touchdown spots and provide guidance commands for the descent engines. The sensor should increase the probability of safe touchdown (no landing failure) from the less than 90 percent estimated for the Mars Viking mission to the current NASA planning requirement of above 98 percent for the Mars Rover Sample Return mission. The sensor must also satisfy mass, volume and power constraints imposed by the limited lander resources. The sensor performance required is analyzed assuming the desired surface feature data is a range-versus-angle map of the accessible landing zone. Existing active and passive sensor technologies were evaluated for the estimated requirements of spatial resolution (1m at 2 km), working slant range (2 km), range precision (0.25 m) and frame rates above 1 Hz. Pixel mapping rate was identified as the critical sensor parameter because of limited descent time and lander power. A concept of an active scanned laser radar and scan algorithm for a hazard sensor that meets the requirements using available technology is developed.
Hotz D. F.
Peterson D. G.
Swanson A. S. D.
No associations
LandOfFree
Sensor concept development for hazard detection does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Sensor concept development for hazard detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensor concept development for hazard detection will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1843716