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--- information_for_astronomers:information_of_the_receiver_division:index [2014/04/24 18:07]
rkeller
+++ information_for_astronomers:information_of_the_receiver_division:index [2016/10/19 16:01]
akraus
@@ Line 1: / Line 1: @@
 ===== Information of the receiver division =====
-  * **30cm (0.8-1.3 GHz) UHF receiver** In 2011 a new satellite was lunched by NASA, Aquarius, that uses a radar from 1220 MHz to 1280 MHz to measure the roughness of the oceans surface. During its 10-15 min passage over Effelsberg every 7 days the receiver will be most likely saturated. More information about the satellite and when it actually passes Effelsberg can be found on the following pages: [[http://aquarius.nasa.gov/|Aquarius Mission page by NASA]] and [[http://www.heavens-above.com/PassSummary.aspx?satid=37673&lat=50.52494&lng=6.8827&loc=100m+Effelsberg+RT&alt=331&tz=CET| Visible passes over Effelsberg]].
+For more information visit our wiki pages [[ https://eff100mwiki.mpifr-bonn.mpg.de/doku.php?id=electronics:index|'Electronic department']].
-  * October 2012: The 7mm secondary focus receiver is available again. It was fully tested, the calibration parameters from the receiver web page are still valid. More information can be found on the [[electronics:elempfängerbeschreibungen|Receiver's Info Page]] (in German).
-  * April 24 2014: unfortunately the 7mm Receiver is broken again. Both channels don't show power at the IF. We are working on it.
+  * January 2016 (R. Keller): TimeTech GPS Receivers out of service!
-  * July 2012: The phase-switch off the polarimeter of the 2.8cm secondary focus receiver is repaired. To reduce polarimetric data taken between late August 2011 and July 2012 can be reduced using the "nos5" option in the [[information_for_astronomers:user_guide:reduc_pointing|toolbox]].
-  * March 2014: there was a workshop on general polarization measurement issues in Bonn. Here are the files provided from C. Henkel of the contributions:{{:electronics:elsystemgruppenwiki:pol-akraus-210314.pdf|A. Kraus}}, {{:information_for_astronomers:information_of_the_receiver_division:pol-aroy-210314.pdf|A. Roy}}, {{:information_for_astronomers:information_of_the_receiver_division:pol-beck-210314.pdf|R. Beck}}, {{:information_for_astronomers:information_of_the_receiver_division:pol-bklein-210314.pdf|B. Klein}}, {{:information_for_astronomers:information_of_the_receiver_division:pol-friedrich-210314.pdf|F. Wyrowski}}, {{:information_for_astronomers:information_of_the_receiver_division:pol-ramesh-210314.pdf|R. Karapusami}}, {{:information_for_astronomers:information_of_the_receiver_division:pol-wiese-210314.pdf|H. Wiesemeier}}
+Auf Grund eines Fehlers im GPS Systems fiel am 25.1.2016 das Teleskopsystem aus. Diverse Satelliten zeigten einen Zeitversatz von 13,7μsec, was durch mehrere Observatorien weltweit bestätigt wurde (siehe {{:electronics:elsystemgruppenwiki:gps_zeitsprung_vom_25.1.2016.pdf|e-mails}}). Daraufhin wurde ein Satellit dekommissioniert.
+Offensichtlicht haben die TimeTech Receiver ein inkonsistentes Signal geliefert, sodass der VME Rechner die Fehlermeldung 'Starting new day' mit der Zeit 00:00:00 und demselben Tag brachte. Daraufhin blieb der 6msec Interrupt aus und das System blieb stehen.
+Wir haben dann IRIG auf die alte TruTime Uhr gelegt, welche bei den Zeitsprüngen zwar neu synchronisiert hat, aber ein schlüssiges IRIG liefertte. Die TimeTech Uhren laufen seit 26.1.2016 ohne Einfluss mit, protokollieren aber weiterhin die Zeitabweichung Maser vs. GPS.
+Siehe auch [[electronics:elsystemgruppenwiki:gps_receiver]].
+Relevant for astronomical measurements for the time beeing is the TruTime GPS receiver in the control room!
+ * May 2015 (R. Keller):
+    The 7mm Receiver is available with only 1 Channel RHC! This will be kept until the new Q-Band receiver is ready. Sorry for that.
+  * March 2014: there was a workshop on general polarization measurement issues in Bonn. Here are the files provided from C. Henkel of the contributions:{{:electronics:elsystemgruppenwiki:pol-akraus-210314.pdf|A. Kraus}}, {{:information_for_astronomers:information_of_the_receiver_division:pol-aroy-210314.pdf|A. Roy}}, {{:information_for_astronomers:information_of_the_receiver_division:pol-beck-210314.pdf|R. Beck}}, {{:information_for_astronomers:information_of_the_receiver_division:pol-bklein-210314.pdf|B. Klein}}, {{:information_for_astronomers:information_of_the_receiver_division:pol-friedrich-210314.pdf|F. Wyrowski}}, {{:information_for_astronomers:information_of_the_receiver_division:pol-ramesh-210314.pdf|R. Karapusami}}, {{:information_for_astronomers:information_of_the_receiver_division:pol-wiese-210314.pdf|H. Wiesemeyer}}

Effelsberg 100m Teleskop

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