Changes between Version 59 and Version 60 of RoboDIMM

Timestamp:

Dec 7, 2010, 11:36:44 PM (16 years ago)

Author:

giebink

Comment:

--

RoboDIMM

@@ -474 +474 @@
 === __September 7, 2010__ ===
 
+Locations 2,3, and 4.
 During the RoboDIMM observations I made last night at Reber Circle the wind was 3-6 m/s as measured at the DNSM and out of the SE. After struggling for nearly an hour trying to get the RoboDIMMs to track Vega, a star nearly as close to zenith as Altair, the star the DNSMwas tracking, I gave up and moved to Arcturus which was dropping to
 the west. The disparity in reported seeing values in the attached plot during this period appear to reflect the difference between the RoboDIMMs and the DNSM in the altitude of their respective target stars. Despite looking through quite a bit of atmosphere the RoboDIMMs seem to be fairly consistent.
@@ -483 +484 @@
 === __September 10, 2010__ ===
 
+Location 4 (labelled Location 2 on jpg)
+
+The attached plots shows data collected from the RoboDIMMs separated by a distance of about 40' on Reber Circle. Winds were close to 6 m/s early in the evening but dropped to just over 2 m/s by the end. High clouds necessitated moving the DIMMs to a number of different targets as well as repeatedly restarting the program and re-acquiring stars. The last hour was spent tracking a star quite low in the sky
+
  * [https://svn.pan-starrs.ifa.hawaii.edu/trac/ipp/attachment/wiki/RoboDIMM/Reber-seeing-9.10.10.jpg Seeing Plot]
 
-The attached plots shows data collected from the RoboDIMMs separated by a distance of about 40' on Reber Circle. Winds were close to 6 m/s early in the evening but dropped to just over 2 m/s by the end. High clouds necessitated moving the DIMMs to a number of different targets as well as repeatedly restarting the program and re-acquiring stars. The last hour was spent tracking a star quite low in the sky
-
 === __September 14, 2010__ ===
 
+40 ft NW (labelled Location 2 on jpg)
+
 Attached are last nights results. The winds were ~10m/s out of the E-SE during the evening. The static DIMM was sheltered from the wind somewhat by the PS2 containers. I believe this accounts for the differences between the DIMMs between 6:30 and 7. At that time I moved from a Arcturus which was fairly low to Rasalhague which was closer to zenith. Both DIMMs were affected by the wind but the one toward the center was buffeted more. Despite this, it appears that the measurements coincide well and it seems that we can conclude that seeing is relatively consistent across Reber Circle.
 
@@ -495 +500 @@
 === __September 23, 2010__ ===
 
+Airglow roof and Reber Circle center
+
+Plot only has short time segment where "fuzzball" event didn't occur
 
  * [https://svn.pan-starrs.ifa.hawaii.edu/trac/ipp/attachment/wiki/RoboDIMM/corrected-Reber-seeing-9.23.10.jpg Seeing Plot]
@@ -500 +508 @@
 === __October 14, 2010__ ===
 
-In the attached plot the DNSM data is corrected to zenith and converted to FWHM, the RoboDIMM data is converted to FWHM, and the PS1 FWHM is directly out of the DB. Throughout the night the winds were < 5 m/s out of the NE. The large gap in the DNSM data is due to high clouds obscuring Altair. At 8 UT the DNSM moved to Diphda and resumed data collection. The high clouds moved across the RoboDIMM's path to Vega a few times requiring that the DIMMs be restarted. During the time period that RoboDIMM data was collected PS1 was pointed to the SE.
+Airglow roof and Reber Circle center
+
+In the attached plot the DNSM data is corrected to zenith and converted to FWHM, the RoboDIMM data is converted to FWHM, and the PS1 FWHM is corrected for airmass. Throughout the night the winds were < 5 m/s out of the NE. The large gap in the DNSM data is due to high clouds obscuring Altair. At 8 UT the DNSM moved to Diphda and resumed data collection. The high clouds moved across the RoboDIMM's path to Vega a few times requiring that the DIMMs be restarted. During the time period that RoboDIMM data was collected PS1 was pointed to the SE.
 
  * [https://svn.pan-starrs.ifa.hawaii.edu/trac/ipp/attachment/wiki/RoboDIMM/corrected-Reber-seeing-10.14.10.jpg Seeing Plot]