| 1) Windows machines should use the Firefox browser, as Microsoft Internet Explorer has known issues.
|
| 2) GREAT and FIFI-LS sensitivity values were updated for Cycle 9. Time and signal-to-noise calculations should be updated accordingly for Cycle 9 before proposal submission. The sensitivity of the 4GREAT Channel 2 band degrades strongly at frequencies lower than 900 GHz, and this is not captured by SITE. Please contact the GREAT team or the SOFIA help desk for help with your time estimate if your line is in this frequency range.
|
| 3) For users requesting HAWC+ scan-polarimetric techniques, we encourage to contact the HAWC+ Team at SOFIA to discuss the sensitivities and scan options.
|
| 4) HAWC+ imaging and polarization sensitivity values were updated in July 2019 to reflect the in-flight (measured) instrument performance. The sensitivity values used in SITE for cycles before Cycle 6 were estimates based on the theoretical performance of the instrument. The current values are different from the July 2018 estimates by up to nearly 50%, but generally <~ 20%. Time and signal-to-noise calculations should be updated accordingly for Cycle 9 before proposal submission.
|
| 5) FORCAST sensitivity values were updated in July, 2019 to reflect the in-flight (measured) instrument performance. These sensitivity values are different from - generally better than - values previously used in SITE by <~ 30%. Time and signal-to-noise calculations should be updated accordingly for Cycle 9 before proposal submission.
|
| 6) On some platforms and browsers, such as Safari, the SITE version information may not display.
|
| 7) For HAWC+, the Cycle 7 version of SITE was incorrectly including overheads in the calculations. This was corrected as of 23
Aug 2018. Proposers are encouraged to recheck their signal-to-noise and time estimations with the revised version of SITE.
|
| 8) When the filter selections are changed, the entries in the flux boxes change to their default values (these are the fluxes for which an S/N of 4 is obtained in 900 seconds in single channel mode). The entries are set to the default values REGARDLESS of the values of time or S/N entered in the "Calculation Method" boxes. Furthermore, the entries follow the units set alongside the short wavelength box. [SPR509]
|
| 9) Note that SITE does NOT do any unit conversions for user-entered values.
|
| 10) To prevent any confusion regarding values and units, the user should perform these steps in the following order: (i) choose the desired filter or filter combination, (ii) choose the calculation method, (iii) choose the units desired, (iv) explicitly enter the fluxes (in the desired units) in both long and short wavelength boxes, and (v) click on the "Calculate" button.
|
| 11) For FORCAST, the *actual* filter configuration is determined after the TAC has awarded observing time, so that SITE may not reflect the current configuration. If filters are subsequently moved between short and long wavelength optical paths, the sensitivities will change from what is estimated here.
|
| 12) For HAWC_PLUS, in the polarization configuration, the returned/entered S/N is that for the polarized flux (p x F), not the fractional polarization ( p ) alone. If the S/N on total flux F is high, the S/N on the fractional polarization will be approximately the same as that on the polarized flux.
|
