MERLIN (man-made satellite)
| MERLIN | |
|---|---|
| Position | CNES, DLR |
| State | Under a plan |
| Purpose | Methane concentration measurement |
| It is targeted for observation | The atmosphere of the earth |
| Design life | Three years |
| The launching date and time | 2016 (plan) |
| Physical good point | |
| Main body dimensions | 0.8m x 0.8m x 1.2m |
| Mass | 250 kg |
| Outbreak electricity | 280W |
| Main pusher | Chemistry raster (1N) *4 |
| Posture control system | 3 axis posture control |
| Orbital element | |
| It is targeted for go-around | The earth |
| Orbit | Sun synchronous orbit |
| Orbit angle of inclination (i) | 97.4 degrees |
| The recurrence days | 28th |
| Observation equipment | |
| IPDA LIDAR | Methane observation rider |
The man-made satellite which observes the density of methane that MERLIN (MEthane Remote Sensing LIdar MissioN) is one of the causative agents of the global warming. As a common enterprise of French national space research center (CNES) and aerospace center (DLR) in Germany, display in 2016 is planned.
Table of contents
Summary
Methane has the high greenhouse effect of 21 times [1] of carbon dioxide, and the discharge reduction is demanded by international agreements such as the Kyoto Protocol. In the ground observation point, there are too few numbers while the quantitative grasp is demanded for measures and an evaluation of the methane reduction, and a role of the remote sensing using the man-made satellite becomes important. The joint development of the smallsat which watched regional distribution of the methane density and a time change was started by the resolution of the Germany and France Cabinet meeting of February, 2010 [2]. The two countries share the estimated expense with 120 million euros equally.
GOSAT (breathe) (design life five years) was launched for the man-made satellite which included methane in an observation object in 2009, but there was limitation that observation only for dayside and it being and an observation result were easy to be affected by fine particles and the cloud in the atmosphere because it was the observation with the passive sensor which assumed light of the sun a source of light. MERLIN clears these problems by adopting the observation approach of the active sensor using the laser and aims at the further observation precision improvement. The platform used for the satellite is past, and, in French MYRIADE with the display results of 15 planes, in MERLIN, it is in the first satellite adopting development type "MYRIADE EVOLUTIONS". A German side is in charge of development, the production of the methane observation equipment which is a payload, and the mission control after the launching is performed by French Toulouse space center.
Observation equipment
- It is absorption rider Integrated Path Differential Absorption LIDAR for a unification course difference
- It is the methane observation rider by the absorption method for a difference. Turn right under a satellite and slightly irradiate a near-infrared light laser pulse by 2 different wavelengths (1645.552nm and 1645.846nm) and observe the atmospheric airlight in a reflecting telescope of diameter 690mm. Wavelength around 1,600nm is one of the infrared absorption spectra of methane, but there is a difference in the absorption factor with methane, and 2 wavelengths that I sent out calculate methane density because a comparison analyzes the reception signal strength of 2 wavelengths. Ass thorium and Kayser-Threde company are in charge of development.
Allied item
Footnote
- ^ "Kyoto Protocol accomplishment plan (March 28, 2008 revision) "Ministry of the Environment
- ^ "MERLIN: The Methane Mission" Research in Germany
References, outside link
This article is taken from the Japanese Wikipedia MERLIN (man-made satellite)
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