Changes
SHOC
,/* Change Log */
== Change Log ==
'''Most recent changes at the top'''
* '''v1.4.3 Release date 25 July 2018<br>'''
** Bug: Fixed GPS antenna reference "off" bug by assigning per-telescope locations
** Feature: Added a button to set GPS start time 30 seconds into the future (uses web browser operating system's time so make sure that your time zone is SAST)
* '''v1.4.2 Release date 3 January 2018<br>'''
** Feature: Better error reporting
** Feature: TCS info now available when mounted on the 40-inch
* '''v1.4.0 Release date 23 November 2016<br>'''
* If using external triggering, select the GPS tab <span style="color: red">'''(1)'''</span>
* Ensure timing is valid <span style="color: red">'''(2)'''</span>.
* Set the Programmed Output Pulse (POP) parameters (mode <span style="color: red">'''(3)'''</span>, pulse width <span style="color: red">'''(4)'''</span>, start date <span style="color: red">'''(5)'''</span>, start time <span style="color: red">'''(6)'''</span>(<strong>NOTE</strong>: the "now + 30 seconds" button uses your browser's time so make sure your operating system is set to local time), trigger interval <span style="color: red">'''(7)'''</span>) and click apply <span style="color: red">'''(8)'''</span>. The status should change to pending <span style="color: red">'''(9)'''</span>.
* The recommended default pulse width is 10 microseconds.
When running a series of exposures on the same target with different filters it
can be useful to make use of the automated acquisition mode on the camera tab.'''NOTE: SCRIPTING ALWAYS USES THE INTERNAL TRIGGER'''
[[File:scripting_1.png|1000px]]
''This functionality should be available on the 74", the 40" and the new 1m. It has only been tested on the 74".''
The idea is to take a long, GPS-triggered data cube with SHOC at high cadence, while running the LED at 1 PPS (which has a longer pulse on the minute and can thus be used to test absolute timing accuracy).
*The dome and mirror covers must be OPEN for this test to work. (The GPS needs to get satellite signal, and the LED must be seen through the light path.)
*There is an LED mounted in the telescope optical path that can be used to independently verify SHOC timing. Log into the following website:
** Fire up a terminal
** $ ssh <user>@<shocndisbelief|shocnawe>.suth.saao.ac.za
** $ cd /home/ccd/programming/shoc/shoc/-gps** $ python -cli.py
** The commands in the cli are help, status, pop, mask, bias, timing_mode and location. Use "help <command>" for more information.
** The timing_mode option makes the GPS use static or dynamic mode.
