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Home > Instrumentation > Heterodyne Instruments > Observing time calculator > Calculator ON/OFF Integration Time Estimator

The SEPIA receiver temperature in use is estimated from the lab

Use this calculator for on-off observations. If you are planning on-the-fly mapping, you should instead use the dedicated OTF Calculator

ON/OFF RMS estimator
The (average) elevation of the source, the receiver temperature, an on-source integration time ,and the spectral resolution, the σ (in K) can be estimated.See the observing time calculation page for details. To use a coarser vel. resolution Δvnew than selectable multiply the resulting σ with sqrt(Δv/Δvnew). The total time is calculated assuming toff=ton and a system observing efficiency of 0.4, i.e. ttotal=(ton + toff)/0.4. The RMS estimation use the t.
Heterodyne receiver:
Frequency: [GHz]
Full resolution Δv [32k channels] : [km/s]
Manual resolution Δv: [km/s]
Redshift z:
Sky Frequency: [GHz]
pwv : [mm H2O]
Source elevation: [deg]
On Time : [s]
Results
Tau (source elev deg) INF
Trec [K] SSB 49.5
Tsys [K] (source elev deg) 64.3
Beam [arcsec] 0
RMS Position Switching 0 [mK]
RMS Beam Switching 0 [mK]
ITC Calculator
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Last update: May 24th, 2015 		[Home]