Sardinia Radio Telescope Exposure Time Calculator

Version Information

• Version 1.8 (March 24th, 2026)

  Spectropolarimetry: updated instrumental parameters.

• Version 1.7 (Sept 25th, 2024)

  Updated instrumental parameters for C-low receiver. Added info on nodding observing strategy in the ETC output for radiometer formula computations.

• Version 1.6 (March 20th, 2024)

  Updated instrumental parameters for C-low and K band receivers; updated list of available backends and configurations.

• Version 1.5 - semester 2024A (Oct 3th, 2023)

  Added C-low receiver and Skarab backend. Updated instrumental parameters (gain and Tsys)

• Version 1.5 - semester 2023B (Sept 15th, 2022)

  Updated gain and beam efficiency values used in computations at 6.7 GHz (C band)




• Version 1.4 (March 4th, 2020)

  All observing modes: Updated the instrumental setup according to semester 2020B.

  Gain computation for K band done by means of polynomial coefficients.




• Version 1.3 (March 18th, 2019)

  All observing modes: Updated the instrumental setup according to semester 2019A.

  Total Power mode: updated computations for OTF Cross Scan option.




• Version 1.2 (Sept 14th, 2018)

  All observing modes: Introduced the possibility to express the sensitivity and the source flux in mJy or in Kelvin. Introduced the parameter for spectral rebinning. Updated the formula to compute Tsys in K band. Added interactive menus to update the available setup according to previous choices. Added the information on the beam efficiency (output page). Updated the instrumental setup according to semester 2019A

  Total Power mode: Introduced the realWorld factor (see manual).

  Spectropolarimetry mode: Added support for the SARDARA backend. The input form implements the real-time computation of the spectral resolution (in MHz and km/sec), given the selected parameters.




• Version 1.1 (March 14th, 2017)

  SRT Total Power: possible IF bandwidths are automatically updated according to the bandwidth of the selected receiver. SRT Spectropol: DBBC temporarily disabled.




• Version 1.0 (November 21st, 2014)

  Updated K-band Tsys computations. Updated page style.




• Version 0.6 (July 24th, 2014)

  Created web page for tabulated values of SRT gain and system temperature used by this ETC. Added link in the main page. Updated page style.




• Version 0.5 (August 01st, 2013)

  Spectropolarimetric computations enabled also for OTF map mode. Improved computations for postion switching. Parameters of spectroscopic backends can get only hardware-allowed values (no more free choice). Improved manual.




• Version 0.4 (May 29th, 2013)

  Updated values for L/P (gain) and C (Tsys) receivers, and very little changes to beam sizes (~1arcsec) according to new tables. Help-on-line for Total Power computations is now available. Upgraded computations of deadTime for OTF Cross Scans and Maps.




• Version 0.3 (March 06th, 2013)

  Added On-The-Fly Map observing mode for Total Power observations.




• Version 0.2 (December 18th, 2012)

  Added On-The-Fly Cross Scan observing mode for Total Power observations. Web output redirected to an external window.




• Version 0.1 (August 03rd, 2012)

  First internal release.