7.5 Log Continuous
GoTo
A GoTo pointing device accessory can be controlled by UDM for the purpose of pointing the meter to various
parts of the sky and automatically gathering a reading at each position.
The following GoTo devices are currently supported:
•
SynScan V4
•
iOptron 8408
The connection of the GoTo device is made to the serial port. Note; some USB to RS232 serial adapters do not act
properly with UDM. Usually an FTDI addapter should work well.
Select the machine type, port, and baud rate. Ensure that the connected device is actually available on the port you
select. In Windows, you can use the Device manager, In Mac and Linux, you can type
dmesg
on the command line in a
terminal window to see the latest USB device attached.
A script file containing the positions is located in the “Data Directory” which is identified by:
View
→
Directories
→
Data Directory.
On a Mac, you can use Finder to go to “Applications”, then right click on “udm” or “udm.app” then select “Show
contents”. Then you can navigate to Contents
→
Resources to see the location of the *.goto file(s).
The format of the GoTo script file is a semicolon-separated file with an extension of “.goto”. Comment lines are preceded
by the pound symbol (#). The second line defines the field format (Zenith;Azimuth). The remaining lines define the
points to move to. An example is:
# Default
# Zenith;Azimuth
0;0
15;0
15;60
15;120
Control of the positioning is done from the trigger page. The “Goto accessory” and “Freshness” check boxes must be
set. Pressing the ”Record” button will start the pointing sequence.
7.5.1 Import.dat into spreadsheet
The .dat file generated by UDM can be imported into a Microsoft Excel spreadsheet for calculations and graphing purposes
as follows:
1. Start excel
2. File Open
3. Select ”All files”
4. Select your .dat file (previously recorded and saved).
5. Select ”delimited” (as opposed to the default ”fixed width”)
6. Import starting at line 33
7. Next
8. Unselect ”Tab”
9. Select ”Semicolon”, you should see bars separating the data fields now.
10. Next
11. Define each field. European users will have to select ”Advanced”, then change the ”Decimal point” to ”.” and
”Thousands separator” to ”,”
12. field 1,2 = date YMD
Note: You can also use the “.dat to Moon .csv” tool shown in Fig. 7.11 to create a comma separated variable file for
importing into a spreadsheet like Excel.
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