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    OMPS documentation Index

    NPOESS Instruments - OMPS

    The Ozone Mapping and Profiler Suite (OMPS) monitors ozone from space. OMPS will collect total column and vertical profile ozone data and continue the daily global data produced by the current ozone monitoring systems, the Solar Backscatter Ultraviolet radiometer (SBUV)/2 and Total Ozone Mapping Spectrometer (TOMS), but with higher fidelity. The collection of this data contributes to fulfilling the U.S. treaty obligation to monitor the ozone depletion for the Montreal Protocol to ensure no gaps on ozone coverage.

    Additional information is available on the OMPS flyer (2421KB).

    OMPS Limb Profiler
    image: OMPS limb Profiler

    The nadir sensor uses a wide field-of-view push-broom telescope to feed two separate spectrometers. The nadir total column spectrometer (mapper) measures the scene radiance between 300 and 380 nanometers (nm) with a resolution of 1 nm sampled at 0.42 nm and a 24-hour ground revisit time. Measurements from this spectrometer are used to generate

    The limb sensor measures the along-track limb scattered solar radiance with 1 km vertical sampling in the spectral range of 290 to 1000 nm. Three vertical slits sample the limb at 250 km cross-track intervals to provide for better than 7-day ground revisit times. The three slits are imaged onto a single charge-coupled device (CCD) (identical to both nadir CCDs).

    OMPS Mission Products

    The OMPS program will create five ozone products
    • High performance Total Column environmental data records (EDR)
    • Heritage TOMS V7 Total Column EDRs
    • High performance Ozone Profile EDRs
    • Heritage SBUV V6 Nadir Profile data records
    • IR Total Column data records from Cross-track Infra-red Sounder (CRIS) radiances
    		 graphic: omps_instruments
    OMPS Instruments

    Artists Concept — OMPS Fields of View
    image: omps Fields of View
    Specifications
    Spectral Range
    Nadir mapper
    Nadir profiler
    Limb profiler
    		 300 — 380 nm
    250 — 310 nm
    290 — 1000 nm
    Spectral Sampling Interval
    Nadir mapper
    Nadir profiler
    Limb Profiler     		2.4 pixels per FWHM
    2.4 pixels per FWHM
    2.0 pixels per FWHM (Full Width Half Maximum)
    Spectral Resolution (FWHM)
    Nadir mapper
    Nadir profiler
    Limb profiler     		1.0 nm
    1.0 nm
    1.5 — 40 nm
    Field-of-View (FOV)
    Nadir mapper
    Nadir profiler
    Limb profiler     		110 x 0.3 deg
    16.7 x 0.3 deg
    8.5 x 2.7 deg (3 slits)
    Revisit time
    Nadir mapper
    Limb profiler     		24 hours
    4 days (average)
    Mass
    Power
    Data rate
    Size     		63 kg
    60 W
    180 kbps
    35 x 54 x 56 cm
    Total Column EDR
    Horizontal Cell Size:
    Measurement Range:
    Accuracy:
    Precision:
    Long-term Stability:     		50 km at nadir
    50-650 Dobson Units (DU)
    15 DU or better
    3 DU + 0.5% or better
    1% over 7 years
    Ozone Profile EDR
    Vertical Coverage:
    Vertical Cell Size:
    Horiz. Cell Size:
    Measurement Range:
    Accuracy:
    Precision:
    Long-term Stability:     		Tropopause — 60 km
    3 km
    250 km
    0.1 — 16 ppmv
    10% (15 — 60 km) 20% (Trop — 15 km)
    3% (15 — 50 km) 10% (Trop — 15km, 50-60km)
    2% over 7 years

    In addition to providing operational ozone data products, OMPS has the potential to provide other surface and atmospheric science data, including anthropogenic trace gases.

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    Last revised: 11/12/2002    

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