David's Astronomy Pages Notes - Session 894 (2021-05-05)

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Notes (S895)

	Session Aims & Highlights
	- Observing Result  - Night Summary Plot  - Session Event Log
	Operational Issues
	- Critical Issues (0),  Major Issues (0),  Minor Issues (9),  Small Defects (3),  Continuous Improvement (4)
	Images from 2021-05-05 >>      [ Local Files >> ]

Session Aims & Highlights (2021-05-05)

Main aims

1. Scope.Jog.  Test new Scope.Jog routine in AstroMain 3.39.8 that is designed to get around occasional issue where TheSky6/ASCOM gives the error mesage"Unable to start Direct Slew".  Ensure that new Scope.Jog routine doesn't interfere with operations or introduce any bugs/instability. Begin process of determining whether the change solves the occassion problems with 'direct slew' / Job Queue freezing.
2. Targets. Acquire images of a selection of variable stars, nearby stars, comets & deep sky targets as allowed by time & conditions

Equipment & Software

• 12" LX200 and ST-10XME
• 80mm APO and ZWO ASI 178MC
• CCDApp2, TheSky6, CCDSoft5, PHD2,  DeviceHub 6.5.1.0,  MeadeGeneric 1.1.0.337, UPB 1.5, ASCOM 6.5 SP1
• Pegasus UPB & Motor Focus, TCF-S
• SharpCap 3.2, PHD2  2.6.9Dev4
   
• AstroMain 3.39.8 / 3.39.9,  AstroPlan 1.21.6,  AstroShCap 1.3.11, AstroGuard 1.6,   AstroVOE 1.7, AstroSN 1.5,  AstroProtect 1.6
  (AstroWeather 1.12.4, AstroAllSky 3.10.4, AstroObsCam 1.5.5 )

Highlights

•   Scope.Jog.  The new Scope.Jog routine used in AstroMain 3.39.8 to get around occasional issue whereby TheSky6/ASCOM gives the error mesage"Unable to start Direct Slew" (Initial version contained a bug that produced too many log messages. This was fixed and installed in-session as AstroMain 3.39.9)

Notes

• AutoStart Details:
  Session begun using Autostart.  Expected vs Actual Timings are tabulated below.
  
    Autostart Earliest StartTime          2021-05-05 22:16               <-- Intended Start (Sun Alt -10.8 deg - 30 mins)
                                          2021-05-05 22:16               <-- Actual Start   (Sun Alt -12.0 deg - 30 mins)    
    Plan created                          2021-04-30 22:19  ( -25 mins  )
    Expected Shutter Opening    Info      2021-04-30 22:21  ( -23 mins )  vs  Actual Opening :    22:22
    Expected Equilbrat'n Start  Info      2021-04-30 22:22  ( -22 mins )  vs  Actual Equil. Start 22:22
    Expected Run Start          Info      2021-04-30 22:27  ( -17 mins )  vs  Actual Run start:   22:27
    Expected Near-Zenith Foc1   Info      2021-04-30 22:28  ( -16 mins )  vs  Actual Foc1 start:  22:27
     Sun Alt -10.8 deg                               22:46               <-- Desired Queue Start (SunALt -10.8 deg)
    Expected Near-Zenith Foc2   Info      2021-04-30 22:36  (  -8 mins )  vs  Actual Foc2 start:  22:34
    Expected Queue Start        Info      2021-04-30 22:42  (  -2 mins )  vs  Actual Queue Start: 22:39  (10m later than intended)
     Sun Alt -12 deg                                 23:03             
    Plan Queue Start            Info      2021-04-30 22:44  ( On Track ) <-- Planned Queue Start

•  Employed  a (Too) Few Stars Threshold of 5. 

Summary Plots & Logs

Observing Plan

Observing Result

Dome & Scope Slewing Performance

Slew/Centering Performance

Guiding Performance Dec Notes : Run 8 (black) failed due to cloud/lost star Run 1 (orange) impacted by periods of ineffective Dec guiding

Sky Conditions (Locate Frames)

Night Sky Summary Plot Top axis: Sky Brightness at Zenith (in ADU/s) Lefthand axis: Local Time (hh LT). Righthand axis: Sun Altitude (degs)

Actual Weather vs Pre-Session Weather Forecast

Session Event Log

Time     Event Detail 19:03:22 Session Monitoring AutoStart monitoring for Live Session opportunity starting between 22:16 & 02:34 22:16:24   AutoStart Waiting AutoStart waiting till earliest start time at 22:16 22:16:25   AutoStart Delayed Session delayed due to cloud 22:28:45 Session AutoStarting Session autostarting (22:28) 22:29:26   Camera1 Connected SBIG Camera Connected (set point -20°C) 22:29:28 Session Created Live Session Created (2021-05-05 S00894, ImageSaveNum: 894001) 22:29:30   Scope Switched On Telescope Power has been switched on via UPB Powerbox. 22:31:09   Services Started Observatory Services started 22:31:15 Observatory (Auto) Observatory placed in Fully-Automated Mode 22:31:18 Session Pending Session pending (2021-05-05) 22:31:20 Session Initiating Session initiating (2021-05-05) 22:31:22   Plan Requested Observing Plan requested from AstroPlan (1.21.6) 22:31:52   Plan Loaded Observing Plan loaded to queue (, Plan ID: 633) 22:31:59   Camera1 Connected SBIG Camera Connected (set point -20°C) 22:32:04   Telescope Connected Telescope Connected (TheSky6) 22:32:14 Session Equilibration Session ready for dome & camera equilibration 22:34:01   Dome Opened Dome opened (opening time 45s) 22:34:17   Equilibration Started Dome Equilibration started 22:39:16   Equilibration Skipped Dome Equilibration skipped by user 22:39:18 Session Running Session running 22:39:20   Queue Started Observing Queue started (16 targets selected) 22:40:33       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 22:43:42       Focusing Completed Foc1 AutoFocus Completed (Profile No 1, wide) 22:45:33       Focusing Completed Foc1 AutoFocus Completed (Profile No 1) 22:45:37       Focusing Started-Foc2 Foc2 Focusing Started (Secondary Scope, using ShCap) 22:47:55       Focusing Completed Foc2 AutoFocus Completed (Profile No 2, wide) 22:49:46       Focusing Completed Foc2 AutoFocus Completed (Profile No 2) 22:50:01       Focusing Checked Foc2 Focusing Check Succeeded 22:51:16     Target Started (1/16) Target started (1/16, NGC 3310 w/SN2021gmj) 22:53:48       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 22:56:01       Focusing Completed Foc1 AutoFocus Completed (Profile No 3) 23:12:08     Target Completed Target completed (1/16, NGC 3310 w/SN2021gmj) 23:13:08     Target Started (2/16) Target started (2/16, UGC 6930 w/SN2020rcq) 23:18:56       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 23:21:10       Focusing Completed Foc1 AutoFocus Completed (Profile No 4) 23:32:16     Target Completed Target completed (2/16, UGC 6930 w/SN2020rcq) 23:32:18     Target Started (3/16) Target started (3/16, Nova Per 2020 (CV)) 23:36:44       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 23:38:42       Focusing Failed Foc1 focusing failed - failed QC check (Ambiguous) 23:47:17     Target Completed Target completed (3/16, Nova Per 2020 (CV)) 23:47:19   Queue Aborted Job Queue aborted 23:47:29   Services Stopped Observatory Services stopped 23:47:33 Program Closed Program closed by User 23:48:19 Session Resumed Live Session Resumed (2021-05-05 S00894, ImageSaveNum: 894024) 23:49:58   Obs.Manager Started Obs.Manager started 23:50:00   Obs.Overseer Started Obs.Overseer started 23:50:04   Services Started Observatory Services started 23:50:13   Telescope Connected Telescope Connected (TheSky6) 23:50:21   Camera1 Connected SBIG Camera Connected (set point -25°C) 23:51:33 Observatory (Auto) Observatory placed in Fully-Automated Mode 23:51:35 Session Pending Session pending (2021-05-05) 23:51:37 Session Initiating Session initiating (2021-05-05) 23:51:39   Plan Loaded Observing Plan loaded to queue (, Plan ID: 633) 23:51:46   Camera1 Connected SBIG Camera Connected (set point -25°C) 23:51:51   Telescope Connected Telescope Connected (TheSky6) 23:52:02 Session Equilibration Session ready for dome & camera equilibration 23:52:04 Session Running Session running 23:52:06   Queue Started Observing Queue started (13 targets selected) 23:52:08     Target Started (4/16) Target started (4/16, NGC 4165 w/SN2021gno) 23:56:54       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 23:58:57       Focusing Completed Foc1 AutoFocus Completed (Profile No 8) 00:11:52     Target Completed Target partially completed (4/16, NGC 4165 w/SN2021gno) 00:15:10     Target Started (5/16) Target started (5/16, NGC 5018 w/SN2021fxy) 00:31:54     Target Completed Target partially completed (5/16, NGC 5018 w/SN2021fxy) 00:31:57     Target Started (6/16) Target started (6/16, UGC 8426 w/AT2021knq) 00:36:04       Focusing Skipped Foc1 focusing skipped - star is lost (TCF-S) 00:53:28     Target Completed Target completed (6/16, UGC 8426 w/AT2021knq) 00:53:30     Target Started (7/16) Target started (7/16, C/2020 T2 (Palomar)) 00:59:39       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 01:02:18       Focusing Completed Foc1 AutoFocus Completed (Profile No 9) 01:14:43     Target Completed Target partially completed (7/16, C/2020 T2 (Palomar)) 01:14:45     Target Started (8/16) Target started (8/16, AT2021kmb) 01:20:14   SoftSuspend Called Soft Suspend is called due to Deteriorating Conditions (too few stars) 01:21:54   SoftSuspend Cancelled Soft Suspend is cancelled due to Improved Conditions 01:24:54   SoftSuspend Called Soft Suspend is called due to Deteriorating Conditions (too few stars) 01:25:19   SoftSuspend Cancelled Soft Suspend is cancelled due to Improved Conditions 01:34:12     Target Completed Target partially completed (8/16, AT2021kmb) 01:34:14     Target Started (9/16) Target started (9/16, GCVS U Her) 01:37:25       Focusing Started-Foc1 Foc1 Focusing Started (TCF-S) 01:39:15       Focusing Completed Foc1 AutoFocus Completed (Profile No 10) 01:40:11 Critical RainThreat Alert Critical Rain Threat Alert (Obs.Manager will close the Shutter) 01:40:13   HardSuspend Called Hard Suspend is called due to Critical Conditions (threat of rain) 01:40:16     Target Aborted (9/16) Target aborted (9/16, GCVS U Her) due to threat of rain 01:40:18   Queue Paused Queue paused For Session Suspension 01:40:20 Session Suspended Session suspended 01:41:06   Dome Closed Dome closed (closing time 50s) 01:42:27     Target Cancelled Target cancelled (9/16, GCVS U Her) due to cloud 01:54:40   UPB.Switch Restart UPB.Switch has been restarted. 02:02:04     Target Cancelled Target cancelled (10/16, UGC 11177 w/AT2021koq) due to cloud 02:14:22     Target Cancelled Target cancelled (11/16, GCVS BL Lac) due to cloud 02:24:40     Target Cancelled Target cancelled (12/16, GCVS CY Lyr) due to rain 02:32:42     Target Cancelled Target cancelled (13/16, 61 Cyg) due to rain 02:44:06     Target Cancelled Target cancelled (14/16, AT2021hkn) due to rain 03:03:58     Target Cancelled Target cancelled (15/16, NGC 7767 w/AT2021kni) due to rain 03:24:48     Target Cancelled Target cancelled (16/16, HIP 87937) due to cloud 03:24:53   Queue Completed Job Queue completed 03:24:55 Session Closing Session closing 03:25:00   Dome Closed Dome already closed (closed at 01:41, closing time 50s) 03:26:00   Dome Parked Dome parked (parking time 52s), Az: 90.0 deg 03:26:50   Telescope Parked Telescope parked (parking time 42s) 03:27:21   Telescope Switched Off Telescope Power has been switched off via UPB Switch. 03:28:12   Services Stopped Night Services stopped 03:28:14 Session Housekeeping Housekeeping Started (Cleanup FITS, Create Fits Summary, Transfer Files) 03:28:21 Session Finished Session Finished

Session Alerts

Time     Alert Detail 23:14:36 Dome Discrepency Difference between Telescope Az and Dome Az is > 8 deg (UGC 6930) 01:54:39 UPB.Switch disconnected UPB.Switch has unexpectedly disconnected. Restart will be attempted 01:54:42 UPB.Switch UPB.Switch has been successfully restarted. 02:05:33 Cloud Sensor Cloud Sensor data has been inactive for more than 5 mins 02:05:43 AllSky/Synopsis AllSky Star & Synopsis data has been inactive for more than 5 mins 02:21:14 AllSky/Synopsis AllSky Star & Synopsis data is active again (outage 20.6 mins) 02:21:24 Cloud Sensor Cloud Sensor data is active again (outage 20.9 mins)

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Operational Issues (2021-05-05, S894)

• Critical Issues (0)
• Major Issues (0)
• Minor Issues (9)
• Small Defects (3)
• Continuous Improvement (4)

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Critical Issues

• None

Major Issues

• None

Minor Issues

• Log File producing too many Jog Monitoring rows (15 rows every 0.01s !). Dramatic increase in number of Log File writes and Log File Size. Bug fixed ( jog monitoring loop in new Scope.Jog routine introduced in AstroMain 3.39.8) was missing a Thread.Sleep (200) statement).  Session stopped in order to install AstroMain 3.39.9 with critical fix.
  Fixed in-Session 2021-05-05 (AstroMain 3.39.9) 
   
• Target 2/16 (UGC 6930) had unusually large 1st and 2nd Locate Point errors (23.94' & 23.79'). Is this the same issue that occurred in session S891 (2021-04-25) ?.  Initial look at report file suggest that both  W and N jogs overshoot causing the scope to end up of the otherside of the target with same amount of point error (ie a double rogue jog).  Target 8/16 (AT2021kmb) also had unusually large 1st and 2nd Locate Point errors (23.54' & 22.23').   Examining Target 2/16 (UGC 6930) the pointing error for Locate 1 was reported as 23.94 when visually the post slew pointing was actually almost spot on.   The Target Cross and Target Ellipse on JPG Picture are correctly drawn.   The large 'corrective' jog after Locate 1 caused by the erronous pointing error explains the large pointing error for Locate 2 (telescope was jogged away from target).  Similarly the Locate 1 Frame for Target 8/16 (AT2021kmb) had a 23.54' pointing error when the actual pointing error was less than 2'.  Other targets didn't have a problem with post-slew pointing error so why were just these 2 targets affected ?   Locate Frame 1 for UGC 6930 had a Linked Screen Rotation of 357.3 rather than 179.8 deg expected.  Locate Frame 1 for AT2021kmb had a Linked Screen Rotation of 357.2 rather than 179.5 deg expected.  This shows the issue is the same issue that occured session S891 (2021-04-25).  Issue was believed to have been fixed in AstroMain 3.39.8 (2021-05-04) but the issue obviously still persists. Investigation determined that this was due to an bug introduced in PositionAndSync() routine in AstroMain 3.39.8 (MisRotation should be < RotateTolerance (not > RotateTolerance ) ).
  Fixed 2021-05-06 (AstroMain 3.39.10)
   
• Many Frames failed to Image Link when Processing Reduced Images.  Investigation determined that this was due to an bug introduced in PositionAndSync() routine in AstroMain 3.39.8 (MisRotation should be < RotateTolerance (not > RotateTolerance ) )
  Fixed 2021-05-06 (AstroMain 3.39.10)
   
• Local Files web page doesn't show the session AzAlt Slewing Plan picture.  Existing BuildJpgPicturePage routine is set up to display up to 4 AzAlt Plan Charts having file name format "AzAltChart." + Session.NightDate + " (v" + CStr(i) + ").png".   'Session.Plan.AzAltChart.png' is generated when night's observing plan is created and is uploaded to website for display on the 'current session', but doesn't seem to be transferred to the Session's Log Folder, and is thus not currently available for the Local Files Web Page.  New routine 'CopyAzAltPlanChart() added to AstroMain / LoadPlanFromDBShell() to transfer plan to session' log folder  after plan loaded . Format of the copied file name is changed to "AzAltPlanChart." + NightID + ".v" + CStr(i) + ".png"
  Fixed 2021-05-06 (AstroMain 3.39.10) 
   
• Position of CCD relative to Guide Reference frame for NGC 5018 target is at an unexpected position.  Pointing error indicate a rogue jog even though this was not counted by the Obs.Manager.  Has a Camera moved relative to the other or is this an artifact of the incorrect/non-appropriate LocateInfo data ?.  A brief investigation shows that Guide Reference Frame picture correctly shows the location of the CCD FOV that is associated with the preceding 3rd and final Locate Frame,  but does not represent the location of CCD FOV associted with the following Main Image Frames due to an intervening centering jog.  A 13' correcting jog was made following the 3rd Locate Frame.  In this situation a 4th Locate Frame should have been taken (without jog), otherwise LocateInfo should have been reset with Null values.   It is unclear what caused the HPLocate Centering to stop after only 3 Locate Frames as PointingError_mins  NOT < SU.AcceptablePointingError. Unable to find bug causing the issue.  Extra trace statements added to AstroMain 3.39.10 and future sessions will be monitored for further incidents, but in the meantime the issue will be closed.
  Closed but monitor for future incidents 2021-05-10 (AstroMain) 
   
• Best Focus Chart started later than other charts. Chart started at 22:30 even though other charts started at 22:00. AstroMain program wasn't restarted  ruling out 'restart' as a factor in the problem.  This is an ongoing issue.  Graph's Start time is taken from MasterGraphStartTime variable unless it hasn't be set yet (ie is vcNullDate) when the StartTime will instead be based on the date/time of the graphs first focus data point.   Trace data (added in AstroMain 3.39.8) provides useful data should narrow down the root of the problem.  Hypothesis is that MasterGraphStartTime is being reset to vcNullDate value between creation of other charts (between 22:29 & 22:31) and the creation of the BestFocus Chart (22:43).   Probably relatest to the time of save/reads of the Session.dat file.
  Code shows MasterGraphStartTime is set to vcNullDate during AssignObservatorySession() routine called either from Obs.Manager.SetupSession when SessionState is SessionState.Initiating and Session is New. This could have happened at 22:31:52, which if so would explain how MasterGraphStartTime could have been reset.   The only other way that MasterGraphStartTime can be set to vcNullDate is if it is read from SessionData file, which can only happen InitialiseSessionData() is called which only happens when AssignObservatoryServices is run. .Extra trace lines and a speculative fix added in AstroMain 3.39.1.  There have been no repeat of the issue in S896-S897 and the Issue is considered to be resolved.
  Fixed 2021-05-06 (AstroMain 3.39.10)
   
• Whilst Connecting Camera,   the "Ok" result was reported after a 'Setting AutoSave Folder...' message.  Connect Camera is run as a Thread and includes a 3s delay giving lots of opportunity for other processes to insert a message into the reporting queue.   The 'Setting AutoSave Folder' message produced by SetAutoSaveFolder() routine probably relates to proceeding Report Lines that Stop & Restart CCDSoft, (ie from RestartCCDSoft() )  but could be an action from Observatory Monitoring, AssignObservatorySession().  Extra trace lines added in AstroMain 3.39.10
  Closed but monitor for future incidents 2021-05-10  (AstroMain) 
   
• Uploading of session files to website by AstroPlan FTP Uploader stalled at 03:13.   Whilst this is an ongoing occasional issue (last seen in session S877, 2021-03-29, with no occurances in sessions S878 to S893 (2021-04-30) when issue occurs it prevents a rapid check-in on observatory/session status in the morning following a session (stalled upload can make it appear that AstroMain stalled partway through session with potential unparked / unclosed equipment, which then requires remote computer login to investigate/resolve as appropriate).  Extra tracing was added to AstroPlan since the incident in Session S872 (2021-03-17) which will help to narrow down the issue.  (Potential idea of using flag files to monitor and conduct an automated intervention to restart AstroPlan).  The issue with Session.ObservatoryLog.log file in this sessions might have led to or contributed to the issue in this particular case.   Logs show that there were Exceptions in AstroPlan's  UploadFileFTP2  routine  starting at 02:00 and again at 03:13 whilst getting RequestStream for various files.
  2021-05-06 02:00:15.95 | Exception in 'UploadFileFTP2' whilst getting RequestStream for Session.Header.js
  2021-05-06 02:00:15.95 | Error: Unable to connect to the remote server
  Issue is considered to be now resolved (2022-04-26) as there have been no incidients of the problem during the multitude of sessions in Q1 2022.
  Closed 2022-04-26 (AstroPlan)
   
• Several cases throughout the day of the UPB Switch being disconnected (2021-05-05) .    In each case the UPB Switch is automatically stopped and restarted by AstroMain. These auto-restarts are invariably successful but is there anything that can be done to stop these disconnections from happening.  Log files have unfortunately been deleted on this occasion.  Has the frequency of this problem reduced in Sessions S940+ following the installation of a new Observatory Computer on 2021-12-06 ?
  To monitor (AstroMain)

Small Defects

• Problem with formating of Report Message surrounding new Report Messages issued by new Scope.Jog routine. Fixed in-session at same time as bug fix to eliminate unhelpful & unnecessary mutiple Jog Monitoring Rows.
  Fixed in-Session 2021-05-05 (AstroMain 3.39.9) 
   
• Exceptions in AstroPlan's  UploadFileFTP2 starting at 01:41 and again starting at 02:23 concerning Session.ObservatoryLog.log
  2021-05-06 01:41:34.57 | Exception in 'UploadFileFTP2' whilst building/writing byte array for Session.ObservatoryLog.log
2021-05-06 01:41:34.57 | Error: Unable to Upload File : C:\Data\CCD Imaging\Live\Session.ObservatoryLog.log
2021-05-06 01:41:34.57 | Error: The underlying connection was closed: .
  Problem might relate to size of file because of the excessive Jog monitoring messages.  The  most recent file upload has a last log message at 23:14
  Error messages in log file continued through the following day (errors only ended end when the bloated Session.ObservatoryLog.log was deleted)
  Closed 2021-05-10 (Session) 
   
• Initial Focus Temperature Chart was missing a right hand axis line.  Axis missing on chart before graph was extended.  Issue has occurred for seond session in a row. No reason found of issue in S893 session (2021-04-30). Previously no exceptions from FocusTemp.ChartBase() routine.  No indication of issue on graph drawn for short -duration session S893.  Unable to find bug causing the issue.  Extra tracing added to AstroMain 3.39.10.   Issue is considered to be resolved, or not worthy for further work.
  Fixed/Resolved 2021-05-06 (AstroMain 3.39.10) 

Continuous Improvement

• Report Linking time at end of report line for Linking Image (catalog) to shorten Report file and make it more readable. As in
    Linking image (UCA/USNO)...  Failed    No Acceptable Match Found (linking time 7.6s)
  Linking image (GSC)...       Failed    No Acceptable Match Found (linking time 11.5s)
  Linking image (UCA/USNO*)... Ok        Stars 9, Scale 1.404, Angle 179.37° (linking time 2.4s)
  Improvement partially implemented in AstroMain 3.39.10 (success case linking time still to be added in)
  Done 2021-05-06 (AstroMain 3.39.10) 
   
• Target 8/16 (AT2021kmb) has an Object Type value of  *  ?  AT2021kmbn (autoloaded to Targets Database by AstroSN on 2021-04-30) has a TNS Type *,  which was then simply used for Object Type as the TNS Target does haven't have a Host Galaxy.   First time this issue has been seen.  It seems to be data-driven issue. (data from Rochester SN download) .  AstroSN code could be changed to set TNS Type to "unk" Object Type to "unk" or "Unknown Transient" when TNS Type is *.
  Fixed 2021-05-11 (AstroSN 1.5.1) 
   
• Query. On the session's Best FocusChart why doesn't the Best Focus Model line pass through the BestFocus Point from Profile 5 ?  Focus Profile 5 was collected for Nova Per 2020 star field at 23:36 to 23:38. The Focus Profile graph looks ok, it should be a good result, but the report file shows that the focus profile failed QC checks due to 'Ambiguous result'.  Ambiguous result is given if Curve Fit isn't used, which can happens if bf0 < bfAlt - 120 Or bf0 > bfAlt + 120
  For this Profile (BestFocus From Curve, bf0 was 5191, whilst bfAlt was 5324.  The difference (133) meant that bf0 was outside the allowed range.    The tolerance has been increased from +/- 120 to +/- 150 in AstroMain 3.39.13
    Code modified 2021-05-10 (AstroMain 3.39.13) 
   
• Modify code to achieve a clear separation between performing Plate Solution and performing Sync & Mapping.   The existing routine PositionAndSync is too complex and makes debugging issues and code maintainence more difficult that needed. Changes & improvements to code made in AstroMain 3.40 series. Closed out following review 2021-08-16.
  Done 2021-08-16 (AstroMain 3.41)

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