- The Earth Observer Newsletter
You will be directed to the NASA Visible Earth webpage when you select Images by Mission below, or click on the images at right that are randomly generated to represent four out of all possible topics.
You are here
Gravity Recovery and Climate Experiment (GRACE)
Current, Extended Mission
Mission Category: ESSP
Launch Date: March 17, 2002
Launch Location: Plesetsk Cosmodrome, Russia
The Gravity Recovery and Climate Experiment (GRACE) mission enables the most precise measurements of Earth's mean and time-variable gravity field ever obtained and should lead to advances in the fields of hydrology (continental and regional water balance, monitoring changes in aquifers), oceanography (studying ocean currents, ocean heat flux, ocean bottom pressure, sea-level rise), and solid-Earth sciences.
Key Gravity Recovery and Climate Experiment Facts
|Altitude:Distance from sea level.||485km|
|Origination:||Joint with Germany|
GPS (Black-Jack Global Positioning System Receiver)
HAIRS (High-Accuracy Inter-satellite Ranging System)
SCA (Star Camera Assembly)
SSA (SuperStar Accelerometer)
USO (Ultra Stable Oscillator)
|Deputy Project Scientist(s):||
- The Gravity Recovery And Climate Experiment (GRACE) (Fact Sheets - 135.55 KB)
- Gravity Recovery And Climate Experiment (GRACE) (Mission Brochures - 568.79 KB)
- CALIPSO/CloudSat/GRACE (Science Writers' Guide - 2.6 MB)
- GRACE (Lithographs - 1.24 MB)
- Sensing Gravity from Space: GRACE Follow-On (Postcards - 6.48 MB)
- Understanding Earth: Our Ocean (Booklets - 11.11 MB)
Relevant Science Focus Areas:
- Climate Variability and Change
- Earth Surface and Interior
- Water and Energy Cycles
Relevant Science Questions:
- How does the Earth system respond to natural and human-induced changes?
- How is the global Earth system changing?
- What are the primary forcings of the Earth system?
- Primary goal: Provide global, high-resolution estimates of the constant and time-variable part of Earth's gravity field, with unprecedented accuracy.
- Secondary goal: Measure several hundred global atmospheric profiles per day to determine how GPS measurements are distorted by Earth's atmosphere and ionosphere.
- Disaster Management
- Water Management