THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – MEASUREMENT INSTRUMENTS
Measurements > Gravity and Magnetic Fields >
Gravity, Magnetic and Geodynamic measurements >
Gravity field


Measurement Definition*: Indicative of the statics and dynamics of the lithosphere and the mantle - Physical unit: [ mGal ] (1 Gal = 0.01 m/s2. i.e. 1 mGal β‰ˆ 10-6 g0 . β€œGal” stands for Galileo) - Accuracy unit: [ mGal ].
InstrumentStatus/
Accuracy
Instrument DescriptionMeasurement TechnologyTimeline
ACC
Accelerometer
Operational
Measurement of the spacecraft non-gravitational accelerations, linear accelerations range: +/- 2*10-4 m/s2; angular measurement range: +/- 9.6* 10-3 rad/s2; measurement bandwidth: 10-4 to 10-2 Hz; Linear resolution: 1.8*10-10 m/s2; angular resolution: 8*10-9 rad/s2.n/a
GPS Receiver (Swarm)
GPS Receiver (Swarm)
Operational
Provides position and timing determinationn/a
GPSP
Global Positioning System Payload
Operational
Precision orbit determination.n/a
GRACE instrument
GRACE instrument
Operational
Includes BlackJack Global Positioning System (Turbo Rogue Space Receiver) and High Accuracy Inter-satellite Ranging System (aka K-band Ranging System) for Inter-satellite ranging system estimates for global models of the mean and time variable Earth gravity field.n/a
Laser Reflectors
Laser Reflectors
Operational
Measures distance between the satellite and the laser tracking stations.n/a
Laser Reflectors (ESA)
Laser Reflectors
Operational
Measures distance between the satellite and the laser tracking stations.n/a
LCCRA
Laser Corner Cube Reflector Assembly
Operational
Accuracy measurements on Lense-Thirring effect and baseline tracking data for General Relativity study and precision geodesy. Also for calibration of radar altimeter bias.n/a
LRA
Laser Retroreflector Array
Operational
Baseline tracking data for precision orbit determination and/or geodesy. Also for calibration of radar altimeter bias. Several types used on various missions. (ASI involved in LAGEOS 2 development).n/a
LRA (LAGEOS)
Laser Retroreflector Array
Operational
Baseline tracking data for precision geodesy. Also for calibration of radar altimeter bias. Several types used on various missions.n/a
LRI
Laser Ranging Instrument
Operational
Inter-satellite ranging measurement to picometer level to be used to estimates for global models of the mean and time variable Earth gravity field.n/a
MWI
Microwave Instrument
Operational
Includes BlackJack Global Positioning System (Turbo Rogue Space Receiver) and High Accuracy Inter-satellite Ranging System (aka K-band Ranging System) for Inter-satellite ranging system estimates for global models of the mean and time variable Earth gravity field.n/a
RRA
Retroreflector Array
Operational
Satellite laser ranging for geodynamic measurements.n/a
GNSS POD Receiver
GNSS POD Receiver
Being developed
 n/a
* Description adapted from WMO.
Copyright CEOS | About | Site Search | Report an Issue Researched and written by Symbios