ObservatoryGSFC is responsible for the principal mission elements, including the design and fabrication of the spacecraft, development of scientific instrumentation.
|Mass with fuel||Not to exceed 1700 kg (3748 lb)|
|Dimensions||1.5 m x 1.5 m x 3.2 m (4.9 ft x 4.9 ft x 10.5 ft)|
|Communications||S-Band - Command & Telemetry
Ka-Band - Science Data
InstrumentsLearn more about the OCI »
PACE will also include two polarimeters. Such instruments are used to measure how the oscillation of sunlight within a geometric plane - known as its polarization - is changed by passing through clouds, aerosols, and the ocean.
The polarimeters onboard the PACE observatory are the Spectro-polarimeter for Planetary Exploration (SPEXone) and the Hyper Angular Research Polarimeter (HARP2). They will be contributed by a consortium based in the Netherlands and University of Maryland Baltimore County, respectively.
Together, SPEXone and HARP2 will meet the PACE mission's needs by providing complementary spectral and angular sampling, polarimetric accuracy, and spatial coverage (see table below). They will provide opportunities for improved OCI atmospheric correction, as well as a comprehensive range of aerosol and cloud science data products beyond what could be accomplished by the OCI alone. Thus, the synergistic payload of the OCI, SPEXone, and HARP2 will be poised to make significant breakthroughs in aerosol-cloud-ocean research.
|Attributes||Hyperspectral (UV) & narrow swath||Hyperangular & wide swath|
|Spectral range [resolution]||385-770 nm in 2-4 nm steps||440, 550, 670 nm [10 nm] & 870 nm [40 nm]|
|Polarized bands||Same range as above in 15-45 nm steps||All|
|Number of viewing angles [degrees]||5 [-57°, -20°, 0°, 20°, 57°]||10 for 440, 550, 870 nm & 60 for 670 nm [spaced over 114°]|
|Coverage [swath width]||±4° [100 km at nadir]||±47° [1556 km at nadir]|
|Global coverage||About 30 days||2 days|
|Ground sample distance||2.5 km||3 km|