Introduction: This abstract continues our series of reports [1-3] on high-resolution topographic mapping of martian terrains based on stereo and photoclinometric analysis of Mars Global Surveyor Mars Orbiter Camera narrow-angle (MGS MOC-NA) images [4]. Our initial efforts [1,2,5] were devoted to quantifying the topographic and slope hazards of candidate landing sites for the Mars Exploration Ro...

1869. [3] Malin M. C. and Edgett K. S. (2000) Science, 290, 1927-1937. [4] Golombek M. P. et al. (2003) JGR, 108, E12. [5] Christensen P. R. (1986) Icarus, 68, 217-

Helicopters are valuable since they can land at unprepared sites; however, current unmanned helicopters are unable to select or validate landing zones (LZs) and approach paths. For operation in unknown terrain it is necessary to assess the safety of a LZ. In this paper, we describe a lidar-based perception system that enables a full-scale autonomous helicopter to identify and land in previously...

The analysis of six landing sites that were candidates for the two NASA Mars Exploration Rovers (MER) benefited from recently available image data from the Thermal Emission Imaging Spectrometer (THEMIS) onboard the 2001 Mars Odyssey spacecraft. The combination of daytime and nighttime thermal infrared images from THEMIS supplemented by additional data sets has lead to new or expanded insights i...

Advances in space robotics technology hinge to a large extent upon the development and deployment of sophisticated new vision-based methods for automated in-space mission operations and scientific survey. To this end, we have developed a new concept for automated terrain analysis that is based upon a generic image enhancement platform—multi-scale retinex (msr) and visual servo (vs) processing. ...

  Reproduction and spawning patterns of the king fish (Scomberomorus commerson) were studied in the Persian Gulf (Hormozgan Province) and Oman Sea from Oct 2006 to Sep 2007. A total of 1120 fish was collected from different landing sites along the Iranian waters. Yearly analysis of the reproductive stages and gonadosomatic index showed a single reproductive cycle beginning in March and continue...

M ODERN air transportation has an excellent flight safety record. When failures do occur in flight, owing to the training and experience of the pilots almost always results in a safe landing. This is evidenced by a rate of only 1.35 accidents per one million hours flown in 2007 by U.S. air carriers [1]. Despite this excellent record, the pilots’ responsibility to land safely in case of an emerg...

  Reproduction and spawning patterns of the king fish (Scomberomorus commerson) were studied in the Persian Gulf (Hormozgan Province) and Oman Sea from Oct 2006 to Sep 2007. A total of 1120 fish was collected from different landing sites along the Iranian waters. Yearly analysis of the reproductive stages and gonadosomatic index showed a single reproductive cycle beginning in March and continue...

guidance and control of aircraft in the landing phase imposes extra pilot work loads, hence application of automatic landing control systems is of great importance. in this study automatic landing control systems are introduced and an optimal landing control system is designed. the control system performance criteria are based on minimum control effort. the designed system is simulated for a tr...