here on earth we use GPS to tell you where you are and give you directions where you want to go once we leave the Earth’s orbit we don’t have GPS signals and for that reason we need some kind of an onboard sensor to tell us our position and velocity like the GPS does for us here on earth NASA have been relying on radar sensors for the landing vehicles that go to the moon and other planetary destination but there are some limitations with the radar and using lidar it can overcome those limitations radar beams are divergent they diverge as they hit the ground the laser beams are or pencil beams so it makes a measurement more precise the navigation Doppler LiDAR built here we see as becoming a standard sensors for the future NASA missions the laser sensors can be a smaller and more efficient which is a big deal when you go into the Moon or Mars every ounce counts it can actually help reduce the cost of the missions because of the high quality of the data and a lot the design margins that go in the landing vehicle can be relaxed for example the Landers leg bank can be reduced because you know your velocity much better or you don’t have to carry as much fuel reserves these are all significant cost savings using the navigation Doppler LiDAR this is one of those technologies that is finding a lot of spin-off commercial applications especially in situations where the GPS signal is not reliable particularly for autonomous aircraft and driverless cars derivative of this technology can play very critical role in enabling safe and efficient driverless cars you

Life at the Lab: Coming in for Landing
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2 thoughts on “Life at the Lab: Coming in for Landing

  • September 13, 2018 at 5:50 pm
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    Marvellous & best & excellent concepts of Technology. Best work by nasa.

    Reply
  • October 11, 2018 at 11:01 am
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    Very well presented Dr. Farzin, exciting work!

    Reply

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