The satellite carries a high-precision altimeter, which sends out short radar pulses that bounce off the ice surface and then back to the satellite.
Satellite-based instruments—even the high-range precision radar altimeter aboard CryoSat-2 just CryoSat-2 justh enough resolution to spot a plane-sizedoobject in'thaveast, 60,000-square-kilometer swathigh southenoughdian Ocean now identified as the presolutionarch area.
The more accurate spacecraft orbit determination enables new scientific goals for LOLA, as the orbit reconstruction error level becomes comparable to the altimeter intrinsic precision.
Modern means of automatic control are proposed including precision instruments (designed radio-altimeter and 3-D Time of Flight based onboard sensor) developed for such purposes as well as control laws synthesis algorithms have been described.
The precision of the LALT and LAM laser altimeters with 3σ are claimed to be ±4 m and ±5 m, respectively.
This paper presents a novel combined block adjustment approach to integrate multiple strips of the Chinese Chang'E-2 imagery and NASA's Lunar Reconnaissance Orbiter (LRO) Laser Altimeter (LOLA) data for precision lunar topographic modeling.
The larger Chang'E-1 crossover residual RMS (than SELENE) may also be due to the fact that the Chang'E-1 laser altimeter (±5 m) has a worse precision than that of SELENE (±4 m).
The payloads include a radar altimeter to measure the sea surface height in combination with a high precision orbit to be determined from tracking data.
The altimeter kept beeping.
The second altimeter gave a like result.
