Preparing for my first Tenerife trip

So since I don’t have a mobile setup like the veterans of the group I’m resigned to fact that I need to take most of my UK setup with me abroad. This means some serious weight to transport, so basically I have the following to pack and carry :

  • Hold bag1 (~18Kg)
    • Skywatcher NEQ6 mount
  • Hold bag2 (~18Kg)
    • Skywatcher Tripod (7Kg)
    • Counterweight (5Kg)
    • Box of accessories (~6Kg)
      • PSU, cables etc
    • Clothes …. I guess
  • Cabin bag1 (~7Kg)
    • Tak FSQ85
    • Tak focal reducer
    • Atik 460 CCD imaging camera
    • Lodestar guide camera
    • PoleMaster camera
    • Lakeside focuser control unit
    • Unihedron SQM
    • ADM Scope plate
  • Cabin bag2 (~6Kg)
    • Atik EFW2 and filters
    • Laptop & NUC
    • Various digital items (GPS, USB hard disk etc)
    • ADM mount puck and scope rings

Hopefully the scope bag will in in the overhead with it’s precious contents….don’t drop it ! The laptop bag should fit under the seat….hopefully.

I won’t be sure on the final weights until the digital handheld scales I’ve ordered arrive tomorrow.

At the moment I’m just finishing the calibration and setup of the Lakeside focuser and it’s configuration in SGPro.

Update : The digital scales arrived so now I have weights for a few items and move things around a bit –

  • Hold Bag1 = 19.3kg
  • Hold Bag2 = 22.5Kg
  • Cabin Bag1 = 8kg
  • Cabin Bag2 = 8.85Kg

Sky Quality Meter

So I recently received from First Light Optics (FLO) the Unihedron Sky Quality Meter (SQM-LU) USB device. The box contained the SQM-LU device, a 2 metre USB cable, CD containing all the necessary software, a hard copy of the user manual and a calibration report.

The device was already factory calibrated and was shipped with latest firmware. The Unihedron Device Manager (UDM) is the standard way to access the device and provides all the necessary options for a simple plug and play experience.

The device can also be connected to a GPS device via the configuration tab to get the location and time so it can be written to the data headers. Measurements can be written on a configurable interval and the file can even be transferred to a remote machine via FTP or SCP (not tested  yet). There is even a simulation mode for when you want to just test the device during the daytime.

The log file structure and protocol is well documented shown above but summarised below

# UTC Date & Time, Local Date & Time, Temperature, Counts, Frequency, MSAS, MoonPhaseDeg, MoonElevDeg, MoonIllum
# YYYY-MM-DDTHH:mm:ss.fff;YYYY-MM-DDTHH:mm:ss.fff;Celsius;number;Hz;mag/arcsec^2;Degrees;Degrees;Percent

There are included examples on the CD showing how to connect the device directly using various languages such as Python and via a RaspberryPi. There is also a freeware program SQM Reader3 with basic functionality  that can be used instead of UDM, they also produce a more fully functional program (SQM Reader Pro) at a cost.

There is a third party ASCOM driver that allows integration with imaging automation software such as SGPro via the ASCOM Observing Conditions Hub

and this value is written directly to the FITs header (SKYQLTY field) of your acquired image.

This device will of course will be joining us on the trip to Tenerife so the measurements can be provided to all and sundry.