NRAO Home  >  Green Bank  |  Wiki Topic:    GB > PTCS > InformationForProjectTeam > AntennaCharacterizationSpring2004 > CommissioningHistory > AGBT08A_056_04

Changes | Index | Search | Statistics | Go

Mustang science run AGBT08A_056_04

Some of the scans of interest to PTCS

• Notes:
  • in the following plots, the "commanded" values were extracted from: /home/gbtlogs/Antenna-AntennaManager-azElCommands
  • and the "actual" values were extracted from /home/gbtlogs/ServoMonitor-ServoMonitor-Az_El_50Hz
• Fastest 8' Crab Nebula box scan: 2008_02_15_01:53:42.fits (scan 22)
  • huge azimuth following error: >1 arcminute; tens of arcsec on QD
  • Az vs. El pattern (black = command, red = actual)
  • position following error vs. time (black = cross-elevation, red = elevation)
  • Commanded position vs. time
  • Commanded velocity vs. time
  • Commanded acceleration vs. time
• More modest scan: Scan 23: 2008_02_15_01:59:49.fits
  • Az vs. El pattern
  • Commanded position vs. time
  • Commanded velocity vs. time
  • Commanded acceleration vs. time
• More modest box scan: Scan 24: 2008_02_15_02:05:58.fits
  • Az/El pattern
  • position following error vs time
  • Commanded position vs. time
  • Commanded velocity vs. time
  • Commanded acceleration vs. time
  • Zoom of commanded acceleration vs. time showing strange 2 Hz oscillation
• More modest box scan: Scan 25 = 2008_02_15_02:12:06.fits
  • Commanded and actual azimuth vs. elevation
  • Commanded position vs. time
  • Commanded velocity vs. time
  • Commanded acceleration vs. time
• Orion box scan: 2008_02_15_02:57:05.fits (scan 38)
  • Az vs. El pattern
  • position following error vs. time
  • Commanded position vs. time
  • Commanded velocity vs. time
  • Commanded acceleration vs. time
• 2 degree lunar daisy scan: scan #57 = 2008_02_15_04:18:07.fits
  • Analogous to Q-band scans obtained in 2005 and 2007
  • Will be useful to analyze and compare to Q-band results in PN51 and PN59 (soon to be updated)
  • Az,El at scan midpoint: 277.3449, 36.18737
  • MJD at scan midpoint = 54511.1805092593 = 04:19:56 UT
  • parallactic angle at scan midpoint = 60.3 deg (from Todd's VERIFY program)
  • Here is the lunar ephemeris table from JPL Horizons

-- ToddHunter - 15 Feb 2008

Attachment:	Action:	Size:	Date:	Who:	Comment:
drawcrab.pdf	action	51152	15 Feb 2008 - 19:45	ToddHunter	fast Crab Nebula box scan trajectory (8' diameter)
drawboxacf.pdf	action	44482	15 Feb 2008 - 19:46	ToddHunter	Crab Nebula box scan trajectory (7' diameter)
draworionbox.pdf	action	45010	15 Feb 2008 - 19:46	ToddHunter	Orion box scan trajectory
fastcrabcompare.pdf	action	157296	15 Feb 2008 - 20:01	ToddHunter	fast Crab Nebula box scan following errors
crabcompare.pdf	action	155448	15 Feb 2008 - 20:02	ToddHunter	Crab Nebula box scan following errors
boxorioncompare.pdf	action	156554	15 Feb 2008 - 20:03	ToddHunter	Orion Nebula box scan following errors
fastcrabaccel.pdf	action	212944	26 Feb 2008 - 02:18	ToddHunter	fast Crab Nebula box scan acceleration vs. time
orionaccel.pdf	action	155923	26 Feb 2008 - 02:19	ToddHunter	Orion Nebula box scan acceleration command vs time
fastcrabvel.pdf	action	211414	26 Feb 2008 - 02:22	ToddHunter	fast Crab Nebula box scan velocity command vs time
orionvel.pdf	action	155367	26 Feb 2008 - 02:23	ToddHunter	Orion Nebula box scan velocity command vs time
boxazimvel.pdf	action	202942	27 Feb 2008 - 23:27	ToddHunter	Crab Nebula box scan velocity command vs time
boxazimaccelzoom.pdf	action	30514	27 Feb 2008 - 23:28	ToddHunter	Zoom of Crab N. box scan accel. command vs time
fastcrabpos.pdf	action	199896	27 Feb 2008 - 22:40	ToddHunter	fast Crab Nebula boxscan: command position vs time
orionpos.pdf	action	192031	27 Feb 2008 - 22:42	ToddHunter	Orion Nebula box scan: commanded position vs. time
boxpos.pdf	action	184979	27 Feb 2008 - 22:45	ToddHunter	Crab Nebula box scan: commanded position vs. time
scan25pos.pdf	action	189698	27 Feb 2008 - 22:55	ToddHunter	Scan 25 box scan: commanded position vs. time
scan25vel.pdf	action	207095	27 Feb 2008 - 22:55	ToddHunter	Scan 25 box scan: commanded velocity vs. time
scan25accel.pdf	action	218043	27 Feb 2008 - 22:56	ToddHunter	Scan 25 box scan: commanded acceleration vs. time
drawscan25.pdf	action	50574	27 Feb 2008 - 22:58	ToddHunter	Scan 25 box scan: azimuth vs. elevation pattern
drawscan23.pdf	action	48883	27 Feb 2008 - 23:06	ToddHunter	Scan 23 box scan: azimuth vs. elevation pattern
scan23pos.pdf	action	191044	27 Feb 2008 - 23:07	ToddHunter	Scan 23 box scan: commanded position vs. time
scan23vel.pdf	action	208370	27 Feb 2008 - 23:09	ToddHunter	Scan 23 box scan: commanded velocity vs. time
scan23accel.pdf	action	219668	27 Feb 2008 - 23:09	ToddHunter	Scan 23 box scan: commanded acceleration vs. time
scan24accel.pdf	action	219454	27 Feb 2008 - 23:24	ToddHunter	Crab Nebula box scan: acceleration command vs time