Submillimeter Wave Astronomy Satellite
The Submillimeter Wave Astronomy Satellite (SWAS) was an astronomical observatory launched on December 5, 1998 as part of the Small Explorer program within NASA. Investigators at Smithsonian Astrophysical Observatory and Goddard Space Flight Center designed the telescope and the spacecraft, respectively.
The satellite examined microwaves from 487–556 GHz that originated in water molecules, molecular oxygen, atomic carbon, and carbon monoxide in space. This corresponds to wavelengths of about 0.54 to 0.61 millimeters (540 to 610 μm). [1]
SWAS made observations until July 21, 2004. In June 2005, the spacecraft was reactivated for a 3 month period (after a year of stand-by operation) in order to observe the effects of the Deep Impact probe's collision with comet P/Tempel 1.[2]
The main optic of SWAS is a 55 cm x 71 cm elliptical off-axis Cassegrain telescope, sending light into a pair of Schottky diode receivers.[3]
SWAS observed a unique area of the spectrum alternately described as submillimeter (for the wavelength of light seen), microwave, radio, and/or far infrared.
Comparison[4] |
Name |
Year |
Wavelength |
Aperture |
Human Eye |
- |
0.39-0.75 μm |
0.01 m |
SWAS |
1998 |
540 - 610 μm |
0.55 - 0.7 |
Spitzer |
2003 |
3-180 μm |
0.85 m |
Hubble WFC3 |
2009 |
0.2-1.7 μm |
2.4 m |
Herschel |
2009 |
60-672 μm |
3.5 m |
See also
References
External links
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Current |
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Planned |
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Proposals |
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Completed |
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Lost |
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Completed |
- hibernating after mission: SWAS (1998-2005)
- TRACE (1998-2010)
- WISE (2009-2011)
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On hiatus |
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Old plans |
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See also |
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Italics indicate probes that failed to deploy or otherwise malfunctioned
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Lunar Prospector | Skynet 4D | Ofek-4 | STS-89 | Soyuz TM-27 | USA-137 | Brasilsat B3 · Inmarsat-3 F5 | Orbcomm FM3 · Orbcomm FM4 · GFO · Ad Astra | Globalstar 1 · Globalstar 2 · Globalstar 3 · Globalstar 4 | Kosmos 2349 | Iridium 50 · Iridium 52 · Iridium 53 · Iridium 54 · Iridium 56 | Kakehashi | SNOE · Teledesic 1 | Hot Bird 4 | Intelsat 806 | Progress M-38 (VDU-2) | USA-138 | SPOT 4 | Iridium 51 · Iridium 61 | Iridium 55 · Iridium 57 · Iridium 58 · Iridium 59 · Iridium 60 | TRACE | Iridium 62 · Iridium 63 · Iridium 64 · Iridium 65 · Iridium 66 · Iridium 67 · Iridium 68 | STS-90 | Globalstar 6 · Globalstar 8 · Globalstar 14 · Globalstar 15 | Nilesat 101 · BSat-1B | Kosmos 2350 | Iridium 69 · Iridium 71 | Kosmos 2351 | EchoStar IV | USA-139 | NOAA-15 | Progress M-39 | Iridium 70 · Iridium 72 · Iridium 73 · Iridium 74 · Iridium 75 | Zhongwei 1 | STS-91 | Thor 3 | Kosmos 2352 · Kosmos 2353 · Kosmos 2354 · Kosmos 2355 · Kosmos 2356 · Kosmos 2357 | Intelsat 805 | Kosmos 2358 | Kosmos 2359 | Molniya 3-49 | Nozomi | Shtil-1 · Tubsat-N · Tubsat-N1 | Resurs-O1 #4 · Fasat-Bravo · TMSAT · Gurwin Techsat 1B · WESTPAC · SAFIR-2 | Sinosat-1 | Kosmos 2360 | Orbcomm FM13 · Orbcomm FM14 · Orbcomm FM15 · Orbcomm FM16 · Orbcomm FM17 · Orbcomm FM18 · Orbcomm FM19 · Orbcomm FM20 | Mercury 3 | Soyuz TM-28 | Iridium 3 · Iridium 76 | ST-1 | Galaxy 10 | Astra 2A | Kwangmyŏngsŏng-1 | Iridium 77 · Iridium 79 · Iridium 80 · Iridium 81 · Iridium 82 | Globalstar 5 · Globalstar 7 · Globalstar 9 · Globalstar 10 · Globalstar 11 · Globalstar 12 · Globalstar 13 · Globalstar 16 · Globalstar 17 · Globalstar 18 · Globalstar 20 · Globalstar 21 | PAS-7 | Orbcomm FM21 · Orbcomm FM22 · Orbcomm FM23 · Orbcomm FM24 · Orbcomm FM25 · Orbcomm FM26 · Orbcomm FM27 · Orbcomm FM28 | Molniya-1T #99 | STEX (USA-141) | Eutelsat W2 · Sirius 3 | Hot Bird 5 | USA-140 | Maqsat 3 | Deep Space 1 · SEDSAT-1 | Progress M-40 ( Sputnik 41) | AfriStar · GE-5 | STS-95 (SPARTAN-201 · PANSAT) | PAS-8 | Iridium 2 · Iridium 83 · Iridium 84 · Iridium 85 · Iridium 86 | Zarya | Bonum 1 | STS-88 ( Unity · PMA-1 · PMA-2 · SAC-A · MightySat-1 | Satmex 5 | SWAS | Nadezhda 5 · Astrid 2 | Mars Climate Orbiter | Iridium 11 · Iridium 20 | PAS-6B | Kosmos 2361 | Kosmos 2362 · Kosmos 2363 · Kosmos 2364
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Payloads are separated by bullets ( · ), launches by pipes ( | ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in brackets.
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