Autonomous planetary landing guidance by optical correlation

Details Autonomous planetary landing guidance by optical correlation Autonomous planetary landing guidance by optical correlation

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1702..139k&link_type=abstract

In: Hybrid image and signal processing III; Proceedings of the Meeting, Orlando, FL, Apr. 23, 24, 1992 (A93-27932 10-32), p. 139

Computer Science

Autonomous Navigation, Optical Correlators, Optical Filters, Planetary Landing, Spacecraft Guidance, Cross Correlation, Digital Systems, Satellite Tracking

Scientific paper

We describe our planned use of optical correlation in landmark navigation associated with planetary landing. Standard correlation provides 'pointing-to' information, giving the vector to the landmark from the spacecraft in the spacecraft frame. The synthetic estimation filter (SEF) provides 'pointing-from' information, estimating the vector from the landmark to the spacecraft. Digital and optical SEFs were constructed and compared using a Martian-like 3D modelboard to provide test images. The digital SEF worked reasonably well, but the optical SEF did not perform as expected. The optical SEF was implemented with a liquid crystal television (LCTV) correlator that had been used successfully in previous SEF experiments using a spacecraft model. The results suggest the SLM model for the LCTV needs further refinements. Both the digital and optical filter provided good pointing-to results. We did not plot the correlation surface for the digital SEF response, and though it is less sharp than the POF, it had only a one-pixel variation in the peak location. Surface plots for the conventional optical phase-only filter produced a correlation peak that was sharp enough to be located within two pixels.

Affiliated with

Also associated with

No associations

Rating

Autonomous planetary landing guidance by optical correlation 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 Autonomous planetary landing guidance by optical correlation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Autonomous planetary landing guidance by optical correlation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1532694