Table 1 Timeline of millimeter-wave radiometer at Rikubetsu
Period | SIS mixer | Spectrometer (bandwidth, resolution) | Target | Cold-load vessel |
|---|---|---|---|---|
Nov 1, 1999–Sep 28, 2005 | Tunable SSB mixer | AOS (0.5 GHz, 244 kHz) | Low-angle sky Hot- and cold-load | Polystyrene |
Oct 27, 2005–Nov 19, 2008 | 2SB mixer | AOS (1 GHz, 505 kHz) | Low- and high-angle sky Hot- and cold-load | Polystyrene |
Nov 25 2008–Jul 25, 2013 | 2SB mixer | AOS (1 GHz, 505 kHz) | Low- and high-angle sky Hot- and cold-load | Glass dewar |
Sep 1, 2013–Dec 14, 2013 | DSB mixer + sideband removal filter | AOS (1 GHz, 505 kHz) | Low- and high-angle sky Hot- and cold-load | Glass dewar |
Since Dec 15, 2013 | DSB mixer + sideband removal filter | Digital FFTS (1 GHz, 61 kHz) | Low- and high-angle sky Hot- and cold-load | Glass dewar |