David's Astronomy Pages
Notes - Session 1306 (2025-03-28)

 
Bullet Session Aims & Highlights
 - Observing Result
 - Night Summary Plot
 - Session Event Log
Bullet Operational Issues
  - Critical Issues (0),  Major Issues (1),  Minor Issues (6),  Small Defects (2),  Continuous Improvement (3)
Bullet Images from 2025-03-28 >>         
Bullet Geomagnetic Station - Parts Assembly & Preliminary Testing  (2025-03-28 to 2025-03-30)
   

Session Aims & Highlights (2025-03-28)

Main aims

  1. Targets.  Acquire images of a selection of variable stars, nearby stars, comets & deep sky targets as allowed by sky conditions.

 Equipment & Software

Highlights

Notes

Summary Plots & Logs

Observing Plan
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Observing Result
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Dome & Scope Slewing Performance
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Slew/Centering Performance
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Guiding Performance
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Sky Conditions (Locate Frames)
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Night Sky Summary Plot
Top axis: Sky Brightness at Zenith (in ADU/s)
Lefthand axis: Local Time (hh LT). Righthand axis: Sun Altitude (degs)
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Actual Weather vs Pre-Session Weather Forecast
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Session Event Log
Time     Event Detail
20:34:33 Session Monitoring AutoStart monitoring for Live Session opportunity between 20:34 & 03:37
20:34:35 Session AutoStarting Session autostarting (20:34)
20:34:58   CCDSoft Restarting CCDSoft being restarted (to set AutoSave No.)
20:35:26   Camera1 Connected SBIG Camera connected (Set point -20°C)
20:35:29 Session Created Session Created (Live, 2025-03-28 S01306, ImageSaveNum: 1306001)
20:35:34   Scope Switched On Telescope Power has been switched on via UPB Powerbox.
20:37:17   Services Started Observatory Services started
20:37:25 Observatory (Auto) Observatory placed in Fully-Automated Mode
20:37:28 Session Pending Session pending (2025-03-28)
20:37:30 Session Initiating Session initiating (2025-03-28)
20:37:37   Camera1 Connected SBIG Camera connected (Set point -20°C)
20:37:44   Plan Requested Observing Plan requested from AstroPlan (1.43)
20:38:21   Plan Loaded Observing Plan loaded to queue (Plan ID: 1090)
20:39:00   Telescope Connected Telescope connected (TheSky6)
20:39:25 Session Equilibration Session ready to Open Dome
20:40:10   Dome Opened Dome opened (Opening time 45s, Zigbee 41s)
20:40:45 Session Running Session running
20:40:48   Queue Started Observing Queue started (24 targets selected)
20:40:52     Target Started (NrZen) Target started (Focus Field 10, HIP 49253)
20:41:07       Dome Unparked Dome unparked
20:43:26       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
20:46:06       Focusing Completed Foc1 AutoFocus Completed (Profile No 1, wide)
20:48:30       Focusing Completed Foc1 AutoFocus Completed (Profile No 1)
20:48:34       Focusing Started-Foc2 Foc2 Focusing Started (Secondary Scope, using ShCap)
20:50:46       Focusing Completed Foc2 AutoFocus Completed (Profile No 2, wide)
20:52:39       Focusing Completed Foc2 AutoFocus Completed (Profile No 2)
20:52:58     Target Completed (NrZen) Target completed (Focus Field 10, HIP 49253)
20:54:12     Target Started (1/24) Target started (1/24, GCVS DX Cnc)
20:58:02       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
21:03:58     Target Completed Target completed (1/24, GCVS DX Cnc)
21:05:24     Target Started (2/24) Target started (2/24, ESO 565-G19 w/SN2025efc)
21:11:36       Focusing Skipped Foc1 focusing skipped - unable to find a star (TCF-S)
21:18:14   Critical RainThreat Alert Critical Rain Threat Alert (Obs.Manager will close the Dome)
21:18:16   HardSuspend Called Hard Suspend called due to Critical Conditions (threat of rain)
21:18:21     Target Aborted (2/24) Target aborted (2/24, ESO 565-G19 w/SN2025efc) due to threat of rain
21:18:23   Queue Paused Queue paused for Session Suspension
21:18:25 Session Suspending Session suspending
21:19:15   Dome Closed Dome closed (Closing time 50s, Zigbee 43s)
21:19:16 Session Suspended Session suspended
21:21:19 Session Resuming Session resuming
21:22:04   Dome Opened Dome opened (Opening time 45s, Zigbee 41s)
21:22:07 Session Running Session running
21:22:10   Queue Resumed Observing Queue resumed
21:22:12     Target Started (2/24) Target started (2/24, ESO 565-G19 w/SN2025efc)
21:29:46       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
21:29:55       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
21:32:25     Target Completed Target partially completed (2/24, ESO 565-G19 w/SN2025efc)
21:32:29     Target Started (3/24) Target started (3/24, NGC 2986 w/SN2025gj)
21:33:16       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
21:34:31       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
21:37:11       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (too few stars)
21:39:02   Critical Rain Alert Critical Rain Alert (Obs.Manager will close the Dome)
21:39:04   HardSuspend Called Hard Suspend called due to Critical Conditions (rain)
21:39:06     Target Aborted (3/24) Target aborted (3/24, NGC 2986 w/SN2025gj) due to rain
21:39:08   Queue Paused Queue paused for Session Suspension
21:39:12 Session Suspending Session suspending
21:40:01   Dome Closed Dome closed (Closing time 50s, Zigbee 43s)
21:40:04 Session Suspended Session suspended
21:47:00     Target Cancelled Target cancelled (3/24, NGC 2986 w/SN2025gj) due to threat of rain
21:49:42 Session Resuming Session resuming
21:50:27   Dome Opened Dome opened (Opening time 45s, Zigbee 41s)
21:50:30 Session Running Session running
21:50:33   Queue Resumed Observing Queue resumed
21:50:35     Target Started (4/24) Target started (4/24, AT2025lr)
21:54:59       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
21:57:39       Focusing Completed Foc1 AutoFocus Completed (Profile No 3)
22:14:16     Target Completed Target completed (4/24, AT2025lr)
22:14:20     Target Started (5/24) Target started (5/24, M86)
22:17:40   Critical Rain Alert Critical Rain Alert (Obs.Manager will close the Dome)
22:17:42   HardSuspend Called Hard Suspend called due to Critical Conditions (rain)
22:17:44     Target Aborted (5/24) Target aborted (5/24, M86) due to rain
22:17:46   Queue Paused Queue paused for Session Suspension
22:17:48 Session Suspending Session suspending
22:18:35   Dome Closed Dome closed (Closing time 49s, Zigbee 43s)
22:18:38 Session Suspended Session suspended
22:31:40     Target Cancelled Target cancelled (5/24, M86) due to too few stars
22:31:42 Session Resuming Session resuming
22:32:27   Dome Opened Dome opened (Opening time 45s, Zigbee 41s)
22:32:30 Session Running Session running
22:32:32   Queue Resumed Observing Queue resumed
22:32:35     Target Started (6/24) Target started (6/24, AT2025euu)
22:38:25       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
22:39:19       Focusing Failed Foc1 focusing failed - star lost
22:55:52     Target Completed Target completed (6/24, AT2025euu)
22:56:44     Target Started (7/24) Target started (7/24, LEDA 2155454 w/SN2025erh)
23:00:50       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
23:03:47       Focusing Completed Foc1 AutoFocus Completed (Profile No 5)
23:14:56       SoftSuspend Called Soft Suspend called due to Deteriorating Conditions (reducing clarity)
23:20:03     Target Completed Target completed (7/24, LEDA 2155454 w/SN2025erh)
23:20:05   Queue Paused Queue paused for Session Suspension
23:20:07 Session Suspending Session suspending
23:20:57   Dome Closed Dome closed (Closing time 50s, Zigbee 44s)
23:20:58 Session Suspended Session suspended
23:38:20     Target Cancelled Target cancelled (8/24, UGC 5695 w/SN2025cfc) due to cloud
00:00:40     Target Cancelled Target cancelled (9/24, NGC 3277 w/SN2025coe) due to cloud
00:05:27 Session Resuming Session resuming
00:06:11   Dome Opened Dome opened (Opening time 45s, Zigbee 41s)
00:06:15 Session Running Session running
00:06:17   Queue Resumed Observing Queue resumed
00:06:19     Target Started (10/24) Target started (10/24, M99)
00:10:04       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
00:27:08     Target Completed Target completed (10/24, M99)
00:27:12     Target Started (11/24) Target started (11/24, UGC 8239 w/SN2025N)
00:30:32       Focusing Skipped Foc1 focusing skipped - unable to find a star (TCF-S)
00:46:41     Target Completed Target completed (11/24, UGC 8239 w/SN2025N)
00:48:25     Target Started (12/24) Target started (12/24, NGC 5957 w/SN2025fvw)
00:51:58       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
00:54:52       Focusing Completed Foc1 AutoFocus Completed (Profile No 6)
01:11:30     Target Completed Target completed (12/24, NGC 5957 w/SN2025fvw)
01:11:34     Target Started (13/24) Target started (13/24, T CrB)
01:14:52       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
01:17:28       Focusing Completed Foc1 AutoFocus Completed (Profile No 7)
01:22:53     Target Completed Target completed (13/24, T CrB)
01:22:57     Target Started (14/24) Target started (14/24, 29P/Schwassmann-Wachmann)
01:27:06       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
01:43:40     Target Completed Target completed (14/24, 29P/Schwassmann-Wachmann)
01:43:44     Target Started (15/24) Target started (15/24, AT2025lc (CV))
01:47:37       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
01:50:13       Focusing Completed Foc1 AutoFocus Completed (Profile No 8)
01:56:30     Target Completed Target completed (15/24, AT2025lc (CV))
01:56:34     Target Started (16/24) Target started (16/24, AT2025md (CV))
01:59:35       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
02:02:21       Focusing Completed Foc1 AutoFocus Completed (Profile No 9)
02:09:51     Target Completed Target completed (16/24, AT2025md (CV))
02:09:56     Target Started (17/24) Target started (17/24, 61 Cyg)
02:13:17       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
02:15:05     Target Completed Target completed (17/24, 61 Cyg)
02:15:09     Target Started (18/24) Target started (18/24, AT2025la)
02:19:09       Focusing Skipped Foc1 focusing skipped - star is lost (TCF-S)
02:35:12     Target Completed Target completed (18/24, AT2025la)
02:37:11     Target Started (19/24) Target started (19/24, GCVS BL Lac)
02:41:03       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
02:43:45       Focusing Completed Foc1 AutoFocus Completed (Profile No 10)
02:48:07     Target Completed Target completed (19/24, GCVS BL Lac)
02:48:11     Target Started (20/24) Target started (20/24, M31 w/AT2025etj)
02:52:25       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
03:09:30     Target Completed Target completed (20/24, M31 w/AT2025etj)
03:09:49     Target Started (21/24) Target started (21/24, AT2025esy)
03:13:47       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
03:27:04   SBIG Camera Take Image failed (Command timed-out)
03:27:06   CCDSoft Restarting CCDSoft being restarted (attempt to fix locked thread)
03:27:13   SBIG Camera Reset SBIG Camera being power-cycled
03:28:08   Camera1 Connected SBIG Camera connected (Set point -25°C)
03:28:11   SBIG Camera Take Image command accepted (bSbigDriverException flag is reset)
03:31:25     Target Completed Target completed (21/24, AT2025esy)
03:32:09     Target Started (22/24) Target started (22/24, HIP 87937)
03:47:58     Target Completed Target completed (22/24, HIP 87937)
03:48:02     Target Started (23/24) Target started (23/24, C/2023 A3 (Tsuchinshan-ATLAS))
03:58:03     Target Completed Target partially completed (23/24, C/2023 A3 (Tsuchinshan-ATLAS))
03:58:07     Target Started (24/24) Target started (24/24, AT2025esx)
04:19:27     Target Completed Target completed (24/24, AT2025esx)
04:19:29   Queue Completed Job Queue completed
04:19:32 Session Closing Session closing
04:20:28   Dome Closed Dome closed (Closing time 50s, Zigbee 44s)
04:21:11   Dome Parked Dome parked (parking time 35s), Az: 90.0 deg
04:21:49   Telescope Parked Telescope parked (parking time 30s total)
04:22:13   Telescope State Handbox reads 'Scope parked Turn scope off.'
04:22:35   Telescope Switched Off Telescope Power has been switched off via UPB Switch.
04:24:00   Services Stopped Night Services stopped
04:24:02 Session Finishing Session Finishing started (Create Fits Summary, Transfer Files)
04:24:35     Dome (Find Park) Find Park started (Search Az 88.0 to 92.0°, Step 0.2°, Narrow)
04:25:20     Dome Find Park found (Best Park Az 90.4°)
04:25:26     Dome Dome has been synced at park position (Az 90.0°, Adjustment: -0.4°)
04:25:28   Dome Parked Dome parked
04:27:18   Dome Charging Dome is parked and re-charging Ok (26mA)
04:27:20 Session Finished Session Finished
 
Session Alerts & Alarms
Time     Type       Name Detail
21:39:26 Red Alarm Dome Unsafe CloudSensor detects Rain, but Shutter Sensor is open
21:39:57 Green Clear Dome Safe Shutter Sensor indicates that Dome is now closed
03:27:04 Red Alert SBIG Camera Alert Take Image failed (Command timed-out)
03:28:11 Green Clear SBIG Camera Take Image command accepted (bSbigDriverException flag is reset)
04:27:18 Green Clear Dome Charging Dome is parked and re-charging Ok (26mA)
 

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Operational Issues (2025-03-28, S1306)

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Critical Issues

Major Issues

Minor Issues

Small Defects

Continuous Improvement

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Fig 1.  Rain Event at 21:39

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Fig 2. AllSky Image at 21:38:54 showing passing cloud associated with rain event at 21:39.

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Fig 3. AllSky Image at 21:19:39 showing passing cloud / rain drops associated with rain event at 21:19

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Fig 4. AllSky Image at 22:17:20 showing passing cloud /rain drops associated with rain event at 22:17.

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Geomagnetic Station - Parts Assembly & Preliminary Testing (2025-03-28 to 2025-03-30)

A Geomagnetic Monitoring Station is being added to the Observatory in Spring 2025 for monitoring changes in the earth's magnetic field and to supplement and build upon the Observatory's existing Aurora monitoring that use a Black/White AllSky Camera and new NorthCam Colour Camera.

The following notes describe the Parts Assembly & Preliminary Testing Phase.

Other notes  :
| Review | SAM III | Site Prep | Assembly Design | Parts Assembly |  Testing  | Final Assembly | Installation | Commissioning | Remedial Work |

Started Assembly (2025-03-27)

- End caps and Axis endings were joined together with solvent glue.  (x4)

- Wooden  Circles glued in place internally (these will hold the magnetometre sensors in place)  (x3)

- Opened Bags with FG-3+ magnetometers,  Fluxgate Capacitors & Black Plastic Terminals
(Green terminal block are for connection to SAM III Unit )

Image

- Small circuit board built for each magnetometer, and connected to a Cat6 cable at one end and to a FG-3+ magnetometer at the other via wires & plastic terminal (x3)

Image   Image


- Each circut / magnetometer was connected to the SAM III controller in turn and tested to ensure it was worked (x3)
(one circuit initially didn't work due to a bad solder connection and had to be fixed).

- Made a matrix of tests after noticing that one of the magnetometers showed readings that were offet from the others when all 3 sensors were pointing the same direction, as if it they had a different bias.

- Each magnetometer was connected in turn to Circuit 1 (x), Circuit 2 (y) & Circuit 3 (z) and the reading recorded when the magnetometer was pointing North (X),  East (Y), and Down (Z). This produces a 9 x 3 matrix of values (see below)


Sensor Circuit       Sensor Orientation
      North (X) East (Y) Down (Z)
           
           
Magnetometer 1 Circuit A (x)        
  Circuit B (y)        
  Circuit C (z)        
           
Magnetometer 2 Circuit A (x)        
  Circuit B (y)        
  Circuit C (z)        
           
Magnetometer 3 Circuit A (x)        
  Circuit B (y)        
  Circuit C (z)        
           
Expected Values     16467 -100 47326
 (BGS 2025 Model)           


Continued Preliminary Testing (2025-03-30)

Image  Image


Preliminary Sensor Offsets (2025-03-30)

Calculated required Magnetometer Offsets to sensors
 X -833    Y +13584    Z+11815
 
Using -82000 + required offset we get
X -82833,  Y -68416   Z -70185
  
These were applied to SAM unit via SAM Init
 Image

 

| Review | SAM III | Site Prep | Assembly Design | Parts Assembly |  Testing  | Final Assembly | Installation | Commissioning | Remedial Work |

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