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
InstrumentsThe primary science instrument planned for PACE is the Ocean Color Instrument (OCI) which will be capable of measuring the color of the ocean from ultraviolet to shortwave infrared. Learn more about the OCI »
PACE will likely 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.
PACE's polarimeters are planned to be contributed by the Netherlands (SPEXone) and University of Maryland Baltimore County (HARP-2). These instruments are very compact: for example, HARP-2 weighs 13 kg (28.7 lb).
SPEXone will be excellent for aerosol characterization. It will also address aerosol climate objectives beyond those required of the OCI. HARP-2 will extend the aerosol observations to a wider swath and will be excellent for cloud droplet size, along with ice particle shape and roughness determination. It will provide cloud-observing capabilities beyond those required of OCI. Its wide swath will approximately match that of the OCI, offering potentially improved atmospheric correction for ocean color.
|Attributes||Hyperspectral (UV) & narrow swath||Hyperangular & wide swath|
|Spectral range [resolution]||385-770 nm [hyperspectral 2 nm]||440, 550, 670 nm [10 nm] & 870 nm [40 nm]|
|Number of viewing angles [degrees]||5 [-57°, -20°, 0°, 20°, 57°]||20 for 440, 550, 870 nm & 60 for 670 nm [spaced over 114°]|
|Coverage [swath width]||9° [100 km]||94° [1550 km]|
|Ground sample distance||2.5 km||3 km|
|In July 2017, the mission entered Phase B, Preliminary Design & Technology Completion, with an expected launch readiness date of 2022. View the full mission timeline »|