- Actual Dimensions:
- Instrument:
33.8 (l) x 25.9 (w) x 58.4 (h) cm
- ICE:
33.8 (l) x 25.9 (w) x 25.4 (h) cm
- Radiometer Assy:
33.1 (h) x 24.1 (dia) cm
- Mass Budget Request: 23.5 kg Max
- Radiometer Assembly, ~8 kg
- ICE Assembly, ~14 kg
-
Cable Assembly, ~1 kg
- Mechanical Interface to S/C
- Radiometer FOV 1.0°
- Radiometer FOR 7.0°
- Aligned to EPIC camera boresite w/i 0.1°
- Thermal Interface to S/C
- ICE: 20 ± 10 °C
- Heat transfer rate: 2-3 W conductive to
S/C
- Power Consumption: ~43 watts @ 28vdc
- Command/Data Interface
- Mil Std 1553
- Average 2400 bits/s
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Researchers from the NIST Optical Technology Division
and Ball Aerospace and Technology Corporation partnered to design and
build the Scripps-NISTAR (NIST Advanced Radiometer) for the proposed
NASA Triana mission that was being led by the Scripps Institute of
Oceanography in the late 1990’s. That mission has not flown yet,
but the instrument was completed and delivered to NASA. Later the
mission name was changed to the Deep Space Climate Observatory
(DSCOVR).
The Scripps-NISTAR instrument package is composed
of three cavity radiometers and one photodiode channel designed to
take advantage of the proposed satellite’s location at the
Lagrange-1 point orbit (the Lagrange-1 is the neutral gravity point
between the Earth and the Sun -- 1.6 million km from
Earth). DSCOVR was designed to provide a unique vantage point from
which to measure both the reflected solar energy and the radiant
power emitted by the sunlit Earth. Scripps-NISTAR is designed to
measure the energy emitted and reflected by Earth, providing
information for global climate models.
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The ambient temperature electrical
substitution radiometers with broad-band filters have been used
for Scripps-NISTAR. Electronics and mechanical parts were built by
Ball Aerospace and Technology Corp. NIST, in partnership with L-1
Standards and Technology, built the radiometers and characterized
and calibrated the flight instrument. The ground-based calibration
chain is tied directly to primary national standards.The proposed
measurements with Scripps-NISTAR will complement other Earth
radiation budget experiments and the ongoing effort to understand
global climate change. |
