Details
| Original language | English |
|---|---|
| Article number | 012023 |
| Journal | Journal of Physics: Conference Series |
| Volume | 154 |
| Early online date | 20 Apr 2009 |
| Publication status | Published - 2009 |
| Event | 7TH INTERNATIONAL LISA SYMPOSIUM - Barcelona, Spain Duration: 16 Jun 2008 → 20 Jun 2008 |
Abstract
The Gravity Recovery and Climate Experiment (GRACE) is one of the present missions to map the Earth's gravity field. The aim of a GRACE follow-on mission is to map the gravitational field of the Earth with higher resolution over at least 6 years. This should lead to a deeper insight into geophysical processes of the Earth's system. One suggested detector for this purpose consists of two identical spacecraft carrying drag-free test masses in a low Earth orbit at an altitude of the order of 300 km, following each other with a distance on the order of 50 to 100 km. Changes in the Earth's gravity field will induce distance fluctuations between two test masses on separate spacecraft. These variations in the frequency range 1 to 100 mHz are to be monitored by a laser interferometer with nanometer precision. We present preliminary results of a heterodyne interferometer configuration using polarising optics, demonstrating the required phase sensitivity.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Journal of Physics: Conference Series, Vol. 154, 012023, 2009.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Laser interferometer for spaceborne mapping of the Earth's gravity field
AU - Dehne, Marina
AU - Cervantes, Felipe Guzmn
AU - Sheard, Benjamin
AU - Heinzel, Gerhard
AU - Danzmann, Karsten
PY - 2009
Y1 - 2009
N2 - The Gravity Recovery and Climate Experiment (GRACE) is one of the present missions to map the Earth's gravity field. The aim of a GRACE follow-on mission is to map the gravitational field of the Earth with higher resolution over at least 6 years. This should lead to a deeper insight into geophysical processes of the Earth's system. One suggested detector for this purpose consists of two identical spacecraft carrying drag-free test masses in a low Earth orbit at an altitude of the order of 300 km, following each other with a distance on the order of 50 to 100 km. Changes in the Earth's gravity field will induce distance fluctuations between two test masses on separate spacecraft. These variations in the frequency range 1 to 100 mHz are to be monitored by a laser interferometer with nanometer precision. We present preliminary results of a heterodyne interferometer configuration using polarising optics, demonstrating the required phase sensitivity.
AB - The Gravity Recovery and Climate Experiment (GRACE) is one of the present missions to map the Earth's gravity field. The aim of a GRACE follow-on mission is to map the gravitational field of the Earth with higher resolution over at least 6 years. This should lead to a deeper insight into geophysical processes of the Earth's system. One suggested detector for this purpose consists of two identical spacecraft carrying drag-free test masses in a low Earth orbit at an altitude of the order of 300 km, following each other with a distance on the order of 50 to 100 km. Changes in the Earth's gravity field will induce distance fluctuations between two test masses on separate spacecraft. These variations in the frequency range 1 to 100 mHz are to be monitored by a laser interferometer with nanometer precision. We present preliminary results of a heterodyne interferometer configuration using polarising optics, demonstrating the required phase sensitivity.
UR - http://www.scopus.com/inward/record.url?scp=66149100495&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/154/1/012023
DO - 10.1088/1742-6596/154/1/012023
M3 - Article
AN - SCOPUS:66149100495
VL - 154
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
M1 - 012023
T2 - 7TH INTERNATIONAL LISA SYMPOSIUM
Y2 - 16 June 2008 through 20 June 2008
ER -