Here is result of determination of Tsys_zen(t) as a function of time. Green line is the model, blue dots are Tsys(t)/m(e), where m(e) is an elevation dependence of Tsys, normalized to be 1 at the zenith direction.
We see sudden jumps. It is improbable these are sudden changes in the atmosphere opacity, because that would have been accompanied with winds of hurricane scale that had not been observed.
KVN station measured tipping curves every hour. Using the estimates of the atmospheric opacity from these measurements, we can evaluate receiver temperature as Trec = Tsys - Tatm*(1.0 - e-p*m(e)), where p is opacity, and m(e) is the so-called wet mapping function that is the ratio of the path delay at a given elevation to the zenith direction, and Tatm is the effective atmosphere temperature.
TAMNA | Tsys(raw) | Opacity | Trec |
ULSAN | Tsys(raw) | Opacity | Trec |
YONSEI | Tsys(raw) | Opacity | Trec |
Analyzing these table, we see that
Last update: 2012.07.08_23:41:53