David's Astronomy Pages
Notes - Session 1194 (2024-02-27)

 
Bullet Session Aims & Highlights
 - Observing Result
 - Night Summary Plot
 - Session Event Log
Bullet Operational Issues
  - Critical Issues (0),  Major Issues (0),  Minor Issues (0),  Small Defects (2),  Continuous Improvement (4)
 
Bullet Images from 2024-02-27 >>         
   
2024-02-28
Bullet Review - Increasing observatory & session resistance to power outages
   
   

Session Aims & Highlights (2024-02-27)

Main aims

  1. Focusing.  Refocus telescope following the Foc1 Focusing failure on Near Zenith Focus Field & out of focus images during S1193 session the previous night
  2. Targets.  Acquire images of a selection of variable stars, nearby stars, comets & deep sky targets as allowed by sky conditions.
  3. 12P/Pons-Brooks. Acquire images of Comet 12P/Pons-Brooks which has been undergoing regular outbursts.
  4. AstroMain. Continue to test fixes to CCDSoft Camera/SBIG Camera operations to prevent stalled execution during starting, fix issues due to occasional repeated failures during Cam1 focusing and occassional unexpected CCD Temperature regulation.

 Equipment & Software

Highlights

Notes:

Summary Plots & Logs

Observing Plan
Image
  
Observing Result
Image
   
Image
 
Dome & Scope Slewing Performance
Image
  
Slew/Centering Performance
Image
  
Guiding Performance
Image
  
Sky Conditions (Locate Frames)
Image 
  
Night Sky Summary Plot
Top axis: Sky Brightness at Zenith (in ADU/s)
Lefthand axis: Local Time (hh LT). Righthand axis: Sun Altitude (degs)
Image   
  
Actual Weather vs Pre-Session Weather Forecast
Image
Image
  
Session Event Log
Time     Event Detail
18:06:31 Session Monitoring AutoStart monitoring for Live Session opportunity between 18:27 & 05:02
18:06:34   AutoStart Waiting AutoStart waiting till earliest start time at 18:27
18:27:47   AutoStart Delayed Session delayed due to too few stars
18:36:33 Session AutoStarting Session autostarting (18:36)
18:36:43   CCDSoft Restarting CCDSoft being restarted (to set AutoSave No.)
18:36:57 Session Created Session Created (Live, 2024-02-27 S01194, ImageSaveNum: 1194001)
18:37:03   Scope Switched On Telescope Power has been switched on via UPB Powerbox.
18:38:49   Services Started Observatory Services started
18:38:56 Observatory (Auto) Observatory placed in Fully-Automated Mode
18:38:58 Session Pending Session pending (2024-02-27)
18:39:00 Session Initiating Session initiating (2024-02-27)
18:39:02   Plan Requested Observing Plan requested from AstroPlan (1.39.7)
18:40:17   Plan Loaded Observing Plan loaded to queue (Plan ID: 968)
18:40:38   Camera1 Connected SBIG Camera connected (Set point -20°C)
18:41:15   Telescope Connected Telescope connected (TheSky6)
18:41:40 Session Equilibration Session ready to Open Dome
18:42:25   Dome Opened Dome opened (Opening time 45s, Zigbee 41s)
18:42:27 Session Running Session running
18:42:29   Queue Started Observing Queue started (35 targets selected)
18:42:30     Target Started (NrZen) Target started (Focus Field 5, HIP 23569)
18:42:45       Dome Unparked Dome unparked
18:47:20       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
18:49:24       Focusing Completed Foc1 AutoFocus Completed (Profile No 1, wide)
18:51:34       Focusing Completed Foc1 AutoFocus Completed (Profile No 1)
18:51:37       Focusing Started-Foc2 Foc2 Focusing Started (Secondary Scope, using ShCap)
18:53:27       Focusing Completed Foc2 AutoFocus Completed (Profile No 2, wide)
18:55:09       Focusing Completed Foc2 AutoFocus Completed (Profile No 2)
18:55:26     Target Completed (NrZen) Target completed (Focus Field 5, HIP 23569)
18:55:30     Target Started (1/35) Target started (1/35, 12P/Pons-Brooks)
18:59:31       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
19:01:27       Focusing Completed Foc1 AutoFocus Completed (Profile No 3)
19:13:47     Target Completed Target completed (1/35, 12P/Pons-Brooks)
19:13:52     Target Started (2/35) Target started (2/35, UGC 831 w/AT2023wdd)
19:17:06       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
19:19:33       Focusing Completed Foc1 AutoFocus Completed (Profile No 4)
19:35:33     Target Completed Target completed (2/35, UGC 831 w/AT2023wdd)
19:35:52     Target Started (3/35) Target started (3/35, 13P/Olbers)
19:39:27       Focusing Skipped Foc1 focusing skipped - star is lost (TCF-S)
19:50:47     Target Completed Target completed (3/35, 13P/Olbers)
19:53:42     Target Started (4/35) Target started (4/35, UGC 12639 w/SN2023jri)
19:57:08       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
20:13:18     Target Completed Target completed (4/35, UGC 12639 w/SN2023jri)
20:15:42     Target Started (5/35) Target started (5/35, Jupiter)
20:22:45     Target Completed Target completed (5/35, Jupiter)
20:31:39     Target Started (6/35) Target started (6/35, 103P/Hartley)
20:35:12       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
20:37:23       Focusing Completed Foc1 AutoFocus Completed (Profile No 5)
20:47:49     Target Completed Target completed (6/35, 103P/Hartley)
20:48:23     Target Started (7/35) Target started (7/35, AT2023cwd (CV))
20:52:02       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
20:58:11     Target Completed Target completed (7/35, AT2023cwd (CV))
21:00:23     Target Started (8/35) Target started (8/35, UGC 3174 w/SN2023mut)
21:03:48       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
21:05:59       Focusing Completed Foc1 AutoFocus Completed (Profile No 6)
21:21:58     Target Completed Target completed (8/35, UGC 3174 w/SN2023mut)
21:22:23     Target Started (9/35) Target started (9/35, AT2023bml)
21:25:16       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
21:27:28       Focusing Completed Foc1 AutoFocus Completed (Profile No 7)
21:43:27     Target Completed Target completed (9/35, AT2023bml)
21:44:23     Target Started (10/35) Target started (10/35, AT2023rey (CV))
21:47:06       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
21:49:19       Focusing Completed Foc1 AutoFocus Completed (Profile No 8)
22:05:07     Target Completed Target completed (10/35, AT2023rey (CV))
22:06:23     Target Started (11/35) Target started (11/35, AT2023cub (CV))
22:09:26       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
22:11:35       Focusing Completed Foc1 AutoFocus Completed (Profile No 9)
22:17:23     Target Completed Target completed (11/35, AT2023cub (CV))
22:18:23     Target Started (12/35) Target started (12/35, AT2023cuz)
22:21:06       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
22:23:31       Focusing Completed Foc1 AutoFocus Completed (Profile No 10)
22:39:44     Target Completed Target completed (12/35, AT2023cuz)
22:40:23     Target Started (13/35) Target started (13/35, GCVS U Gem)
22:43:12       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
22:45:38       Focusing Completed Foc1 AutoFocus Completed (Profile No 11)
22:48:46     Target Completed Target completed (13/35, GCVS U Gem)
22:49:56     Target Started (14/35) Target started (14/35, SN 2022ukr)
22:53:22       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
23:09:42     Target Completed Target completed (14/35, SN 2022ukr)
23:12:16     Target Started (15/35) Target started (15/35, CGCG 119-104 w/SN2024cdi)
23:15:49       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
23:31:54     Target Completed Target completed (15/35, CGCG 119-104 w/SN2024cdi)
23:34:36     Target Started (16/35) Target started (16/35, NGC 3690 w/SN2023wrk)
23:38:17       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
23:40:29       Focusing Completed Foc1 AutoFocus Completed (Profile No 12)
23:56:33     Target Completed Target completed (16/35, NGC 3690 w/SN2023wrk)
23:56:56     Target Started (17/35) Target started (17/35, GCVS RZ LMi)
00:00:20       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
00:02:22       Focusing Completed Foc1 AutoFocus Completed (Profile No 13)
00:07:30     Target Completed Target completed (17/35, GCVS RZ LMi)
00:08:34     Target Started (18/35) Target started (18/35, GCVS AM CVn)
00:11:34       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
00:13:45       Focusing Completed Foc1 AutoFocus Completed (Profile No 14)
00:16:51     Target Completed Target completed (18/35, GCVS AM CVn)
00:18:07     Target Started (19/35) Target started (19/35, NGC 3893 w/AT2023uhx)
00:21:23       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
00:23:43       Focusing Completed Foc1 AutoFocus Completed (Profile No 15)
00:39:46     Target Completed Target completed (19/35, NGC 3893 w/AT2023uhx)
00:40:27     Target Started (20/35) Target started (20/35, 62P/Tsuchinshan)
00:44:57       Focusing Skipped Foc1 focusing skipped - star is lost (TCF-S)
00:56:55     Target Completed Target completed (20/35, 62P/Tsuchinshan)
00:58:29     Target Started (21/35) Target started (21/35, NGC 3467 w/AT2024dda)
00:59:57       SoftSuspend Called Soft Suspend is called due to Deteriorating Conditions (too few stars)
01:01:53       Focusing Skipped Foc1 focusing skipped - star is lost (TCF-S)
01:18:24     Target Completed Target completed (21/35, NGC 3467 w/AT2024dda)
01:18:26   Queue Paused Queue paused for Session Suspension
01:18:28 Session Suspending Session suspending
01:19:15   Dome Closed Dome closed (Closing time 50s, Zigbee 44s)
01:19:17 Session Suspended Session suspended
01:39:25     Target Cancelled Target cancelled (22/35, CGCG 217-021 w/AT2023clc) due to cloud
02:01:45     Target Cancelled Target cancelled (23/35, SN 2022mox) due to cloud
02:24:06     Target Cancelled Target cancelled (24/35, NGC 3206 w/SN2024bch) due to cloud
02:46:05     Target Cancelled Target cancelled (25/35, M105 w/AT2024bpy) due to cloud
03:08:25     Target Cancelled Target cancelled (26/35, UGC 8317 w/AT2022qvu) due to cloud
03:30:45     Target Cancelled Target cancelled (27/35, IC 4688 w/SN2023ftg) due to cloud
03:45:05     Target Cancelled Target cancelled (28/35, AT2023txn) due to too few stars
03:46:49 Session Resuming Session resuming
03:47:34   Dome Opened Dome opened (Opening time 45s, Zigbee 41s)
03:47:36 Session Running Session running
03:47:38   Queue Resumed Observing Queue resumed
03:47:41     Target Started (29/35) Target started (29/35, AT2023clo (CV))
03:51:04       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S)
03:53:00       SoftSuspend Called Soft Suspend is called due to Deteriorating Conditions (too few stars)
03:53:02       Focusing Completed Foc1 AutoFocus Completed (Profile No 16)
03:53:10       SoftSuspend Cancelled Soft Suspend is cancelled due to improved conditions
03:59:20     Target Completed Target completed (29/35, AT2023clo (CV))
03:59:24     Target Started (30/35) Target started (30/35, UGC 11858 w/SN2023rjj)
04:02:35       Focusing Skipped Foc1 focusing skipped - star is too dim (TCF-S)
04:07:01       SoftSuspend Called Soft Suspend is called due to Deteriorating Conditions (too few stars)
04:18:29     Target Completed Target completed (30/35, UGC 11858 w/SN2023rjj)
04:18:31   Queue Paused Queue paused for Session Suspension
04:18:33 Session Suspending Session suspending
04:19:23   Dome Closed Dome closed (Closing time 50s, Zigbee 44s)
04:19:26 Session Suspended Session suspended
04:29:43     Target Cancelled Target cancelled (31/35, GCVS BL Lac) due to cloud
04:45:12     Target Cancelled Target cancelled (32/35, GCVS S Cyg) due to cloud
04:58:12     Target Cancelled Target cancelled (33/35, AT2023abtv (CV)) due to cloud
05:18:32     Target Cancelled Target cancelled (34/35, AT2023tow) due to cloud
05:50:32     Target Cancelled Target cancelled (35/35, AT2023tki) due to cloud
05:50:37   Queue Completed Job Queue completed
05:50:40 Session Closing Session closing
05:50:45   Dome Closed Dome already closed (closed at 04:19, closing time 50s, zigbee 44s)
05:51:13   Dome Parked Dome parked (parking time 20s), Az: 90.0 deg
05:52:39   Telescope Parked Telescope parked (parking time 83s)
05:52:54   Telescope State Handbox reads 'Scope parked Turn scope off.'
05:53:16   Telescope Switched Off Telescope Power has been switched off via UPB Switch.
05:54:40   Dome Charging Dome is parked and re-charging Ok (4mA)
05:54:42   Services Stopped Night Services stopped
05:54:45 Session Finishing Session Finishing started (Create Fits Summary, Transfer Files)
05:55:22     Dome (Find Park) Find Park started (Search Az 87.0 to 93.0°, Step 0.2°, Narrow)
05:56:50     Dome Find Park found (Best Park Az 90.6°)
05:56:57     Dome Dome has been synced at park position (Az 90.0°, Adjustment: -0.6°)
05:56:59   Dome Parked Dome parked
05:58:35   Dome Charging Dome is parked and re-charging Ok (14mA)
05:58:37 Session Finished Session Finished

 
Session Alerts & Alarms
Time     Type       Name Detail
05:58:35 Green Clear Dome Charging Dome is parked and re-charging Ok (14mA)
 

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Operational Issues (2024-02-27 S1194)

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Critical Issues

Major Issues

Minor Issues

Small Defects

Continuous Improvement

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Fig 1.  LAN Speed Tests comparing  2024-02-29 (early am) with 2024-03-01

  Speed Test - 2024-02-29 00:14:57
  Times to upload/download 'LAN Test File.txt' (12.29 MB) to LAPTOP9
  Upload : 5.00 Mbps, 0.63 MB/s
  Download : 13.41 Mbps, 1.68 MB/s
  Average : 9.21 Mbps, 1.15 MB/s
  ----------------------------------------------------------------------------------------
  Speed Test - 2024-02-29 00:15:31
  Times to upload/download 'LAN Test File.txt' (12.29 MB) to LAPTOP7
  Upload : 5.15 Mbps, 0.64 MB/s
  Download : 11.87 Mbps, 1.48 MB/s
  Average : 8.51 Mbps, 1.06 MB/s

  Speed Test - 2024-03-01 08:52:28
  Times to upload/download 'LAN Test File.txt' (12.29 MB) to LAPTOP9
  Upload : 8.88 Mbps, 1.11 MB/s
  Download : 15.40 Mbps, 1.92 MB/s
  Average : 12.14 Mbps, 1.52 MB/s
  ----------------------------------------------------------------------------------------
  Speed Test - 2024-03-01 09:37:11
  Times to upload/download 'LAN Test File.txt' (12.29 MB) to LAPTOP7
  Upload : 8.48 Mbps, 1.06 MB/s
  Download : 18.19 Mbps, 2.27 MB/s
  Average : 13.34 Mbps, 1.67 MB/s

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2024-02-28


Review - Increasing observatory & session resistance to power outages

Issue

Note:  The issue under review concerns short outages in power supply only, ones that come back on after seconds or a few minutes, and not about longer outages in which battery's on observatories computers are drained leaving no automated recovery after the outage ends.

Review

The purpose of this review is two fold  :

1) consolidate the full list of actions to harden the Observatory System & Equipment to the effects of short interruptions in power supply.  What is the specific programming work and/or other work neccesary to achieve the automated recovery for each element of the observatory following a power cut.

 2) examine whether a UPS System (Uninterruptible Power Supply) can be added to the Observatory in a way that provide power to Observatory Equipment in the event of a short outage in incoming power supply and in a way that doesn't effect existing Ethernet Over Powerline / LAN usage. 

Status

Problems caused small power outages have been previously recorded and investigated in various session notes, the most recent of which was the outage at 06:14 on 2024-04-26 which occurred shortly after the finish of the S1192 Session  (see Operational Issues, S1192). There have been several small outages in the last fortnight for reasons unknown.


Equipment/System Recovery  - TBA
The effects of power outage on each element of the observatory system, and whether this based on a known incident or is hypothesized is shown in the table below :

Element Effect during
Power Outage
Effect of
Power Resumption
After Effect Impact   Existing
Recovery
Work Required
(with updated status at 2024-03-11)
               
               
Power Supply - Power supply goes down
- Ethernet over Poweline stops
- Power Supply restored
- Ethernet over Powerline resumes
- Various Observatory elements remain down
until restarted manually.
HIGH
  Various Image Modify AstroMain to record outages better and more timely - Done
 
Image Modify AstroMain to recognise outages shorter than 5s (currently might only recognise outages > 5s) - Done

Image Consider UPS system for critical Observatory elements - Done
LX200 Telescope - LX200 powers down
(due to loss of power to UPB Powerbox)
- Scope likely stays powered down
(UPB Powerbox has the LX200 Off at start-up)
- LX200 not practically available until telescope is
resynced on known star.
V.HIGH
  Significant manual effort required to correct
Telescope Pointing
Image Modify AstroMain to suspend Live Session when a power cut occurs - Done
  
Image Consider UPS system for UPB Powerbox in order to protect LX200 from an uncontrolled shut down -Done
CloudSensor - Cloud Sensor data
goes off
- Cloud Sensor data
stays off
- No fresh CloudSensor
data to AstroWeather,
AstroAllSky, AstroMain
HIGH
  Manual restart of
Cloud Sensor Program
Image Modify AstroWeather to Auto-Restart the Cloud Sensor Program - Done
               
TCF-S Focuser - TCF-S powers down
- TCF-S service goes down
- TCF-S powers up
- TCF-S service stays down
TCF-S service stays down HIGH
  Manual restart of
TCF-S Focuser
service
Image Modify AstroMain to Auto-Restart the TCF-S Focuser service - To Do
               
Zigbee Sensors - Zigbee plugs and connected sensors stop
- AstroMain's WebSocket
connection to deCONZ stops
- AstroMain stops receiving events about zigbee sensors
deCONZ WebSocket remains unavailable deCONZ WebSocket remains down
AstroMain doesn't recognise when there are changes to the zigbee sensors
AstroMain unable to control
plugs like the GreenHouse Heater, AllSky Heater, Dehumidifier.
MED
  Manual Restart deCONZ program
plus a manual restart of the Zigbee Service

Might only have to Restart the Zigbee Service once power is restored.
Image  Add button to AstroMain to Restart Zigbee Service
Image
 Modify AstroMain to recognise outage in WebSocket Service and automatically restart zigbee service.
               
               
UPB Powerbox - Powerbox powers down
- UPB Switch stops
    MED
  OverOverseer
restarts PowerBox
Program /Switch
Image Modify AstroMain to only restart UPB Switch if Power is On - Done
               
AllSky Camera - CCD stops getting fresh images from Camera
- AstroAllSky repeatedly
processes the same image, or gets error code=206.
None CCDSoft continues to not get fresh images from the camera

AstroAllSky continues to repeatedly process the same image or gets error code=206

MED
  Restart CCDSoft
Restart AstroAllSky

Later shown to just need to disconnect and then reconnect the CCDSoft.Camera
Image Fix problem of repeated processing of same image & Error Code=206 in AstroAllSky - Done
               
Pulsar Dome - Dome powers down
- Volatile records show '0'  for each data field
- Shutter shuts if/when outage exceeds 5 mins
- Dome Powers Up
- Volatile records with fresh data again
None LOW
  n/a Image Modify AstroMain to ignore Shutter battery level of 0% - Done
               
               

Note : Even if a UPS System is added to the Observatory, actions to provide automated recovery for the particular observatory elements identified is still warrented since they fill the gap before any UPS system is installed or would be useful anyway as a element might fail for reasons other than a short power outage and therefore an automated recovery of that element would still be appropriate & useful.


Power Monitoring (Current)

AstroMain's Power Monitoring is currently performed in two places.

  1. ObsMonitor has a "Monitor Power" sectiion that normally executes every 2.5s  (but can be longer if the ObsMonitor is held up by any slow tasks).
     
    If the computer is on A/C Power the monitor sets iLaptopPowerOk = 2, whilst If the computer is on Battery it sets iLaptopPower to either 1 or 0 depending on Battery Level.  
     
    Since the Observatory Laptop is permanently attached to a A/C Adapter plugged into the Observatory Power Supply, the variable can be used to monitor the Power Supply status (i.e. whether Power Supply is on (the normal state) or it is off (as in a power outage).  Turning off the A/C Adapter by the user or a failure of the Adapter itself would obviously give a false indication of the Observatory Power Supply status
     
    'LaptopPowerOutageStartTime' is set to the time when the computer is recorded as switching to battery (or the time that monitor starts running if is already battery).  'NumLaptopPowerOutages' is incremented each time an new outage is detected.
     
  2. ObsManager has "Power Outages"  & "Power Outage Period" sections that normally execute every 5s.

    If 'NumLaptopPowerOutages' is greater than the previous number ('LastNumLaptopPowerOutages') an Alert is raised and reported with the current time.
    This will indicate that at least one power outage has occurred within the past 5s or so, but not the time that outage begun, or whether there's been more than one outage within the period. 

    Alerts are raised and reported when a Power Outage lasts more than 30s.  
     
    A further alert is raised and reported when a Power Outage lasts more than 20 minutes.

Critic on current monitoring:

Proposal:

Update:

UPS System

The potential using one or two UPS Systems with offline battery backup are identifed as options for further consideration.   However due to the finding that it is the Observatory LX200 Telescope that can be most affected by an unscheduled power outage, the focus of the review turned to the selection of a UPS System with Battery Backup.  See Review - Off Line Uninterruptible Power Supply (UPS) for the Observatory Telescope.

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