The TRIS experiment performed absolute measurements of the sky brightness in a sky circle at declination +42 degrees at the frequencies 0.60, 0.82, and 2.5 GHz, using geometrically scaled antennas with identical beams (HPBW 18 degrees x 23 degrees). The TRIS group used the data to separate the different contributions to the sky emission and to evaluate the absolute temperature of the CMB at 0.60, 0.82 and 2.5 GHz.
|Recent and most sensitive CMB temperature measurements below 5 GHz.
TRIS data are marked as open squares.
An improvement of more than a factor of 10 was gained at frequencies below 1 GHz.
The data plotted are available here
TRIS Data Products
|0.6 GHz Drift Scan||Absolutely calibrated 0.60 GHz drift scan along a 24h right ascension circle at declination +42 degrees.||1 file 3.7 KB|
|0.82 GHz Drift Scan||Absolutely calibrated 0.82 GHz drift scan along a 24h right ascension circle at declination +42 degrees.||1 file 3.7 KB|
|2.5 GHz Sky Temperatures||Absolute 2.5 GHz sky temperature measurements for 6 positions at declination +42 degrees.||1 file 0.4 KB|
|Beam Profile||H plane and E plane beam profile cuts. The beam profile is the same at 0.6, 0.82, and 2.5 GHz.||1 file 1.8 KB|