RASCAL - RAster SCanning Airborne Lidar - RASCAL is a scanning laser altimeter. The instrument itself simply sends a beam of light, at various angles, a couple thousand times a second towards a target (usually the earth) and
measures the time it takes for the light to return. While measuring this time of flight, other components of the system must measure the position of the aircraft (GPS)* and the alignment of
the aircraft with respect to gravity (INS)*. Gate-ing is performed to make sure the signal measured was the proper one, and a total return energy for the laser is sampled. This will help in
post processing calibration of the system. All measurements are tied to one time frame, so they can be merged later in post processing.
[keywords: RASCAL, ariborne, lidar](Added: 24-Jun-1999 Hits: 808)
[Spider Link]
Scanning Lidar Imager of Canopies by Echo Recovery (SLICER) - SLICER provides high-resolution, geolocated measurements of
vegetation vertical structure and ground elevations beneath dense canopies. The basis of the method is ranging to the surface obtained by precise timing
of the round-trip travel time of short-duration pulses of backscattered, near-infrared (1.06 microns) laser radiation.
[keywords: Code 921, SLICER, laser altimeter](Added: 24-Jun-1999 Hits: 780)
[Spider Link]
Shuttle Laser Altimeter I - The Shuttle Laser Altimeter-01 (SLA-01) was the first of four planned flights to precisely measure the distance to the Earth's surface from the
Space Shuttle. The SLA-01 works by transmission of a series of short laser pulses from the payload in the Shuttle cargo bay and by the
subsequent reception of the weak backscattered laser radiation to the payload.
[keywords: SLA I, laser altimeter](Added: 9-Jun-1999 Hits: 798)
[Spider Link]
Shuttle Laser Altimeter II - SLA-02 emits infrared laser pulses and measures their echoes from the Earth to determine the shape of land surfaces and vegetation canopies.
[keywords: SLA II, laser altimetry](Added: 9-Jun-1999 Hits: 771)
[Spider Link]
