Atacama Pathfinder EXperiment APEX
OLD pages, check new site
Heterodyne Instruments
MPIfR Bonn   ESO   Onsala Space Observatory
  APEX TWIKI CONTACT SEARCH HELP NEWS DISCLAIMER

OTF Time Estimator


OTF time estimator V8.1.2
Heterodyne receiver:
Side Band:
Frequency: [GHz]
Line Freq [+6 & -2 GHz from tuning]: [GHz]
Resolution Δv: [km/s]
pwv : [mm H2O]
Source elevation: [deg]
Length axis in scanning direction: [arcsec]
Length in the orthogonal axis: [arcsec]
Dumptime (0.1 <= dt <= 4 [s]): [sec]
rms or sigma requested : ( 0 [mK] ) [K]
Other Tools
OTF SimulatorHelps you to design a map
Atmospheric transmissionCheck your tuning
ON/OFF OTC CalculatorEstimate on/off integration time
Note about OverheadsOverhead estimates
Time per sub map [sec]0
Number of calibrations per coverage 0
Total map area covered [arcsec2] 0
Number of submaps 1
Tau (source elev deg) 80818.013
Trec [K] 78.3
Tsys [K] (source elev deg) INF
HPBW () [arcsec] 27
Beam solid angle [arcsec2] 917.8
Num of row per Off position (reference pos.) 1
Scanning speed [arsec/ s] 9
Number of coverages 1
sigma reached after 1 coverage [mK]0
sigma reached after 1 coverage(s) [mK]0
On source time [min,hr] 0 | 0
Off source time [min,hr] 0 | 0
Calibration time [min,hr] 0 | 0
Telescope time [min,hr] 0 | 0


Recent changes:


DateVersionInformation
2020-03-138.1.2NFLASH230/345 Trec file modified added a point in the limit of the band. Overhead NFLASH230 changed, use the same values than FLASH
2020-02-268.1.1NFLASH460 modified to 2 polarization, change in number of channels availables in NFLASH460, SEPIA180, SEPIA345
2020-02-148.1NFLASH230 and NFLASH460 sdded
2019-02-288.0.5FLASH345 and FLASH460 modified from SSB to DSB. Only use it in USB mode
2018-09-108.0.4No changes in computation. Updated FE names (SEPIA180, SEPIA660. Added table with tuning ranges per FE. Added warning messages when user inputs incorrect setups
2018-08-318.0.3Includes updates for 2SB SEPIA-B9 after installation and commissioning: Trx curves, sideband rejection and extended tuning range [583-724 GHz]
2018-07-028.0.2Included new SEPIA-B9 setup, new tunning range and change from DSB to 2SB
2018-03-218.0.1LASMA receiver added
2017-09-128.0New set of overhead parameters per instrument, measured from data obtained in 2016. SEPIA-B7 added, The specification values for SEPIA-B7 are provisional (based on the specifications) and will need to be updated after successful installation and commissioning









Instrument Frequency Range:


Instrument Frequency Range [GHz]
NFLASH230
200.0 - 270.0
NFLASH460
385.0 - 500.0
SEPIA180
159.0 - 211.0
SEPIA345
272.0 - 376.0
SEPIA660
578.0 - 738.0
LASMA345
262.0 - 374.0
CHAMP690
620.0 - 720.0
CHAMP810
780.0 - 950.0
FLASH345
262.0 - 374.0
FLASH460
374.0 - 516.0
PI230
200.0 - 270.0
Het230
214.0 - 275.0
Het345
267.0 - 378.0
Het460
385.0 - 500.0