SomeTechnical developments reported on forums for Occultation astronomy
review by Steve Conard (IOTA): https://www.youtube.com/watch?v=s1aHx2sb51E
IOTA Video Capture
software: Download it from IOTA.
Specified for occultation work. It can also check signal-to-noise ratio.
Occultation iPhone App for timing a D-R event (IOTA)
OccuRec is a video recorder for Windows that has been specifically created to provide better options for recording Asteroidal Occultations to the hard-disk particularly when using integrating video cameras. The software is capable of recognizing the integration periods on the fly and can read the IOTA-VTI timestamps also on the fly. A new AAV file format has been created to support the new features of the software, and the AAV format can be analysed with TANGRA 3 (BETA). The on-the-fly processor is intensive - read the min specs suggested and test the system. Resulting video files are smaller than AVI (and are uncompressed)
2015 02 15 ]
> I wonder too about the maximum size of avi files to be opened with tangra ?
The VideoForWindows engine has a
2Gb limit and DirectShow has no size limit.
The better way to do this would be to use OccuRec ( http://www.hristopavlov.net/OccuRec) which will do on the fly integration detection and stacking or can do stacking without integration (for example with PHEMU events where your exposures will be really short and will be running as 1 fps). Stacking 16 frames I get a filesize of around 2Gb for more than 3 hours recording - this is lossless AAV file with Lagarith compression.
Alternately if you measure your full frame rate AVI file Tangra can do "binning" which is si mply stacking of frame measurements into bins.
Other observers may have found different ways of managing the filesize problem with PHEMU events. I know for certain that people are also using lossy MPEG-4 compression which doesn't generally compromise the light curve quality too much and is a good alternative if file size is a problem. I am personally using OccuRec for all my PC astronomical video recording and it works really well with PHEMU events.
There is a review of TimeTheSat by Dave Gault here: http://www.kuriwaobservatory.com/pdf_files/TimeTheSat.pdf
ASCOM 6.1 has support to control video cameras. A number of planetarium programs have expressed an interest in implementing a video client and one of the very "popular" commercial programs has done it - not sure which though.
VIDEO DRIVER for Watec 910BD
Tangra V4 using .NET v4.. Out of date:
Announcing TANGRA 3 (BETA) for Mac, Linux
and Windows (Light
curves and analysis tool to replace TANGRA 1.4)