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information_for_astronomers:rx:p200mm [2013/06/20 16:21] 127.0.0.1 external edit |
information_for_astronomers:rx:p200mm [2015/06/23 12:59] akraus |
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^ Frequency [GHz] ^ Channel ^ Polarisation ^ Tcal [K] ^ Tsys [K] ^ Sensitivity [K/Jy] ^ SEFD [Jy] ^ Aperture Eff. [%] ^ TMB/S [K/Jy] ^ Main Beam Eff. [%] ^ FWHM [arcsec] ^ Last update ^ | ^ Frequency [GHz] ^ Channel ^ Polarisation ^ Tcal [K] ^ Tsys [K] ^ Sensitivity [K/Jy] ^ SEFD [Jy] ^ Aperture Eff. [%] ^ TMB/S [K/Jy] ^ Main Beam Eff. [%] ^ FWHM [arcsec] ^ Last update ^ | ||
- | |1.400 |A |LCP |1.2 |21 |1.55 |14 |54 |2.0 |75 |553 |June 2008 | | + | |1.400 |A |LCP |5.0 |20 |1.54 |13 |54 |1.88 |66 |580 |June 2015| |
- | |1.400 |B |RCP |1.3 |27 |1.55 |18 |53 |2.0 |74 |553 |June 2008 | | + | |1.400 |B |RCP |5.0 |20 |1.56 |13 |54 |1.88 |66 |580 |June 2015 | |
- | |1.660 |A |LCP |1.2 |26 |1.55 |17 |53 |2.0 |76 |473 |June 2008 | | + | |1.660 |A |LCP |1.6 |18 |1.54 |12 |54 |1.85 |65 |490 |October 2013 | |
- | |1.660 |B |RCP |1.4 |27 |1.55 |18 |52 |2.0 |75 |473 |June 2008 | | + | |1.660 |B |RCP |1.5 |19 |1.52 |13 |53 |1.85 |65 |490 |October 2013 | |
^ normalized Gain curve (G = A0 + A1·Elv + A2·Elv2)^^^ Observed in ^ confirmed ^ | ^ normalized Gain curve (G = A0 + A1·Elv + A2·Elv2)^^^ Observed in ^ confirmed ^ | ||
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**Comments:** | **Comments:** | ||
* Strong interferences can occur in this frequency regime, eg. between 1.50 and 1.64 GHz! | * Strong interferences can occur in this frequency regime, eg. between 1.50 and 1.64 GHz! | ||
+ | * There are two values for the noise cal, different by about 6dB. See the table below to learn which receiver version uses which value. | ||
==== Version description for OBSINP ==== | ==== Version description for OBSINP ==== | ||
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| 35 | SB | cross | BW=40MHz, cos AB | | | 35 | SB | cross | BW=40MHz, cos AB | | ||
| 36 | SB | cross | BW=40MHz, sin AB | | | 36 | SB | cross | BW=40MHz, sin AB | | ||
+ | |||
+ | ==== Spectroscopy modes and resolution ==== | ||
+ | ^ BW ^ nchan ^ nu ^ Df ^ Dv ^ dv ^ | ||
+ | ^ MHz ^ ^ MHz ^ kHz ^ km/s ^ km/s ^ | ||
+ | | 100 | 32768 | 1300 | 3.1 | 0.704 | 0.816 | | ||
+ | | 100 | 32768 | 1320 | 3.1 | 0.693 | 0.804 | | ||
+ | | 100 | 32768 | 1340 | 3.1 | 0.683 | 0.792 | | ||
+ | | 100 | 32768 | 1360 | 3.1 | 0.673 | 0.780 | | ||
+ | | 100 | 32768 | 1380 | 3.1 | 0.663 | 0.769 | | ||
+ | | 100 | 32768 | 1400 | 3.1 | 0.653 | 0.758 | | ||
+ | | 100 | 32768 | 1420 | 3.1 | 0.644 | 0.747 | | ||
+ | | 100 | 32768 | 1440 | 3.1 | 0.635 | 0.737 | | ||
+ | | 100 | 32768 | 1600 | 3.1 | 0.572 | 0.663 | | ||
+ | | 100 | 32768 | 1620 | 3.1 | 0.565 | 0.655 | | ||
+ | | 100 | 32768 | 1640 | 3.1 | 0.558 | 0.647 | | ||
+ | | 100 | 32768 | 1660 | 3.1 | 0.551 | 0.639 | | ||
+ | | 100 | 32768 | 1680 | 3.1 | 0.545 | 0.632 | | ||
+ | | 100 | 32768 | 1700 | 3.1 | 0.538 | 0.624 | | ||
+ | | 100 | 32768 | 1720 | 3.1 | 0.532 | 0.617 | | ||
+ | |||
+ | BW ... band width\\ | ||
+ | nchan ... number of spectral channels\\ | ||
+ | nu ... center frequency\\ | ||
+ | Df ... Channel separation (in frequency)\\ | ||
+ | Dv ... Channel separation (in velocity)\\ | ||
+ | dv ... Velocity resolution (dv=1.16*Dv) | ||
==== Tcal measurements ==== | ==== Tcal measurements ==== | ||
+ | ** Tcal as measured in November 2014 **\\ | ||
+ | {{:information_for_astronomers:rx:18cm_tcal_nov14.png|}} | ||
+ | |||
+ | ** Tcal as measured in June 2013 **\\ | ||
{{:information_for_astronomers:rx:18cm_tcal.png|}} | {{:information_for_astronomers:rx:18cm_tcal.png|}} | ||
Note that although the lines continue it is not possible to observe at frequencies between 1425 MHz and 1560 MHz. | Note that although the lines continue it is not possible to observe at frequencies between 1425 MHz and 1560 MHz. |