Doppler lidar sensor for precision landing on the Moon and Mars

Amzajerdian, Farzin; Petway, Larry B.; Hines, Glenn D.; Barnes, Bruce W.; Pierrottet, Diego F.; Lockard, George E.

doi:10.1109/aero.2012.6187004

Cited by 20 publications

(14 citation statements)

References 10 publications

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“…However, the vehicle horizontal position could not be estimated accurately. Li and Amzajerdian have also investigated the IDR with three beams, both proving its excellent estimation of the velocity and the altitude (Li et al, 2010;Amzajerdian et al, 2012). In summary, no navigation sensor or scheme applied previously was able to estimate vehicle horizontal distance to the landing target, which caused large errors in horizontal position.…”

Section: Introductionmentioning

confidence: 94%

“…To determine the vehicle altitude and Cartesian velocity in the target-fixed reference system, the IDR should carry at least three beams in different directions (Amzajerdian et al, 2012). In this paper, a six-beam IDR, similar to the MSL Terminal Descent Sensor, is considered.…”

Section: Integrated Doppler Radarmentioning

confidence: 99%

“…2, with one beam pointed along the vehicle vertical axis (nadir), three beams inclined a degrees from the vertical axis and evenly distributed in azimuth, and two beams inclined b degrees from the nadir axis, each rotated c degrees from the vehicle forward axis in azimuth (Pollard and Chen, 2009). Each antenna measures the vehicle beam-direction distance to the ground and line-of-sight velocity based on the Doppler Principle (Amzajerdian et al, 2012) given by…”

Section: Integrated Doppler Radarmentioning

confidence: 99%

See 2 more Smart Citations

An innovative navigation scheme of powered descent phase for Mars pinpoint landing

Qin

Zhu

Cui

et al. 2014

Advances in Space Research

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Section: Introductionmentioning

confidence: 94%

Section: Integrated Doppler Radarmentioning

confidence: 99%

Section: Integrated Doppler Radarmentioning

confidence: 99%

See 1 more Smart Citation

An innovative navigation scheme of powered descent phase for Mars pinpoint landing

Qin

Zhu

Cui

et al. 2014

Advances in Space Research

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“…The ALHAT Doppler LIDAR is capable of providing ground relative velocity vectors, ground relative range, and vehicle attitude as navigation inputs to a vehicle GN&C system. 22 The Doppler LIDAR is considered to be at a TRL level of 4 from testing a breadboard version in ALHAT Field Test 2. The ALHAT Laser Altimeter has a much greater operational range than the Doppler LIDAR, and is an alternate sensor to the flash LIDAR for the TRN function.…”

Section: Sensorsmentioning

confidence: 99%

Free-Flight Terrestrial Rocket Lander Demonstration for NASA's Autonomous Landing and Hazard Avoidance Technology (ALHAT) System

Rutishauser

Epp

Robertson

2012

AIAA SPACE 2012 Conference &Amp; Exposition

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“…[1][2][3] The system, consisting of an optical head comprising three lidar transmitters that make a 45…”

Section: Introductionmentioning

confidence: 99%

Simulation of a Doppler lidar system for autonomous navigation and hazard avoidance during planetary landing

Budge

Chester

2016

SPIE Proceedings

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The latest mission proposals for exploration of solar system bodies require accurate position and velocity data during the descent phase in order to ensure safe, soft landing at the pre-designated sites. During landing maneuvers, the accuracy of the on-board inertial measurement unit (IMU) may not be reliable due to drift over extended travel times to destinations. NASA has proposed an advanced Doppler lidar system with multiple beams that can be used to accurately determine attitude and position of the landing vehicle during descent, and to detect hazards that might exist in the landing area.In order to assess the effectiveness of such a Doppler lidar landing system, it is valuable to simulate the system with different beam numbers and configurations. In addition, the effectiveness of the system to detect and map potential landing hazards must be understood. This paper reports the simulated system performance for a proposed multi-beam Doppler lidar using the LadarSIM system simulation software. Details of the simulation methods are given, as well as lidar performance parameters such as range and velocity accuracy, detection and false alarm rates, and examples of the Doppler lidars ability to detect and characterize simulated hazards in the landing site. The simulation includes modulated pulse generation and coherent detection methods, beam footprint simulation, beam scanning, and interaction with terrain.

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Doppler lidar sensor for precision landing on the Moon and Mars

Cited by 20 publications

References 10 publications

An innovative navigation scheme of powered descent phase for Mars pinpoint landing

An innovative navigation scheme of powered descent phase for Mars pinpoint landing

Free-Flight Terrestrial Rocket Lander Demonstration for NASA's Autonomous Landing and Hazard Avoidance Technology (ALHAT) System

Simulation of a Doppler lidar system for autonomous navigation and hazard avoidance during planetary landing

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