ON/OFF Integration time estimator V 7.3
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Use this calculator for on-off observations. If you are planning on-the-fly mapping, you should instead use the dedicated OTF Calculator
The (average) elevation of the source, the receiver temperature, required σ (in K), and the spectral resolution, the on-source integration time can be estimated.
System overheads include telescope movements, software overheads, observing mode efficiency, etc. Setup + calibration overheads include source acquisition, pointing, focus, receiver tuning and calibration scans. Note about overheads.
For an overview of the atmospheric transmission and the possible backend configurations for each receiver, check our instrument setup tool.
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| Heterodyne receiver: |
| | Tuning Freq: | [GHz]
| | Line Freq [+6 & -2 GHz from tuning]: | [GHz]
| | Side Band: | | | Full resolution Δv [ channels] : | [km/s]
| | Manual resolution Δv: | [km/s]
| | pwv : | [mm H2O]
| | Source elevation: | [deg]
| | rms (0 [K]) : | [mK]
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Results
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| Tau (@ elev deg) | 19081.93 |
| Transmission (@ elev deg) | 0 |
| Trec [K] | 72.5 |
| Tsys [K] (source elev deg) | INF |
| TsysImage [K] (source elev deg) | 72.5 |
| Beam [arcsec] | 27 |
| Position Switching On time | 0.000 [s] |
| Position Switching Off time | 0.000 [s] |
| Position Switching OverHead time | 0.000 [s] |
| | Total Position Switching time | 0.000 [s] |
| | Beam Switching On time | 0.000 [s] |
| | Beam Switching Off time | 0.000 [s] |
| | Beam Switching OverHead time | 0.000 [s] |
| | Total Beam Switching time | 0.000 [s] |
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When you are satisfied with your time estimate, please copy and paste this text in your proposal time justification:
| Date | Version | Information |
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| 2021-02-23 | 7.3 | Trec for SEPIA345 updated according to the results obtained during the commissioning of the instrument in 2020, Trec NFLASH updated with the full band range |
| 2020-10-13 | 7.2 | Added transmission value, the proposal text use the PWV value selected in the form (before use a default value per instrument), the input rms value is in mK (before was K) |
| 2020-10-08 | 7.1 | Full velocity resolution values updated |
| 2020-07-10 | 7.1 | Values to estimate the overhead have been updated. The time estimation have been split in ON, OFF and Overhead (System, calibration,pointing and focus). Message with the estimation result added at the end |
| 2020-05-18 | 7.0 | Overhead parameters updated |
| 2020-03-13 | 6.1.2 | NFLASH230/345 Trec file modified added a point in the limit of the band. Overhead NFLASH230 changed, use the same values than FLASH |
| 6.1.2 | shows RMS value in mK unit too |
| 2020-02-25 | 6.1.1 | NFLASH460 modified to 2 polarization, change in number of channels availables in NFLASH460, SEPIA180, SEPIA345 |
| 2020-02-13 | 6.1 | No changes in computation. Added FE names NFLASH230, NFLASH460 |
| 2018-09-10 | 6.0.5 | No changes in computation. Updated FE names (SEPIA180, SEPIA660. Added table with tuning ranges per FE. Added warning messages when user inputs incorrect setups |
| 2018-08-31 | 6.0.4 | Includes updates for 2SB SEPIA-B9 after installation and commissioning: Trx curves, sideband rejection and extended tuning range [583-724 GHz] |
| 2018-07-02 | 6.0.3 | Updates with new SEPIA-B9 setup, new tunning range and change from DSB to 2SB |
| 2018-03-21 | 6.0.2 | LASMA receiver added |
| 2017-09-06 | 6.0.1 | New version 6.0.1, Fix a bug in off time estimation for integration time calculator V6.0 |
| 2017-08-30 | 6.0 | New version 6.0 available. New set of overhead parameters per instrument, measured from data obtained in 2016.
SEPIA-B7 added, The specification values for SEPIA-B7 are estimates and will need to be updated after successful installation and commissioning |