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Instrument: MOPITT : Measurements Of Pollution In The Troposphere |
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Associated Platforms TERRA Spectral/Frequency Information Number Channels: 8 Spectral/Frequency Coverage/Range: 4.7 µm, 2.4 µm, 2.3 µm Related Data Sets View all records related to this instrument Description The objective of the Measurement of Pollution in the Troposphere (MOPITT) spectrometer is to measure emitted and reflected infrared radiance in the atmospheric column to permit retrieval of tropospheric carbon monoxide (CO) profiles and total column methane. Observations of CO and methane will be used to study how these gases interact with the surface, ocean, and biomass systems. The MOPITT instrument is bases on the principle of correlation spectroscopy utilizing both pressure-modulated and length-modulated gas cells, with detectors at 2.3, 2.4, and 4.7 micrometer. Atmospheric profiles of CO are measured with the 4.7 micrometer detector. CO and methane are measured by the 2.4 and 2.3 micrometer channels, respectively, sense solar radiation reflected from the surface. The MOPITT is a scanning instrument with a field-of-view of 1.8 degrees (22-km footprint at nadir). The scan line consists of 28 pixels, each at 1.8 degree increments with a maximum scan angle of 25.2 degrees off-axis (swath width of 620-km). MOPITT data products are expected to include gridded retrievals of methane with a horizontal resolution of 120 km at 1 % accuracy and gridded CO soundings with 10 % accuracy in three vertical layers between 0 and 15 km. The MOPITT instrument was launched on the NASA Earth Observing System (EOS) Terra spacecraft on December 18, 1999. Key MOPITT Facts: Joint with Canada Heritage: Measurement of Air Pollution from Satellites (MAPS), Pressure Modulator Radiometer (PMR), Stratospheric and Mesospheric Sounder (SAMS), and Improved Stratospheric and Mesospheric Sounder (ISAMS) instruments Instrument Type: Eight-channel radiometer CO Concentration Accuracy: 10% CH4 Column Abundance Accuracy: 1% Swath: 640 km (29 fields of view) Spatial Resolution (each pixel): 22 km ? 22 km (at nadir) Dimensions: 115 cm x 93 cm x 57 cm (stowed), 115 cm x 105 cm x 71 cm (deployed) Mass: 192 kg Power: 250 W (average), 260 W (peak) Duty Cycle: 100% Data Rate: 28 kbps Thermal Control: 80 K Stirling-cycle cooler, capillary-pumped cold plate and passive radiation Thermal Operating Range: 25°C (instrument), 100 K (detectors) Instrument IFOV: 22 km across track, 88 km along track (1.8° x 7.2° x 4° pixels) Spectral Range: Correlation spectroscopy utilizing both pressure and length-modulated gas cells, with detectors at 2.3, 2.4, and 4.7 µm Direct Broadcast: No; Rapid Response processing available Prime Contractor: COM DEV The Canadian Space Agency provided the instrument [Summary provided by NASA] Online Resources http://terra.nasa.gov/About/MOPITT/index.php http://www.atmosp.physics.utoronto.ca/MOPITT/home.html http://mopitt.eos.ucar.edu/ http://www.atmosp.physics.utoronto.ca/MOPITT/home.html Instrument Logistics Data Rate: 28 kbps Instrument Start Date: 1999-12-18 Instrument Owner: Canada/CSA |
