The Orion nebula with AstroDMx Capture for Linux and the SVBONY SV305 camera

The SVBONY SV305 camera is now implemented in AstroDMx Capture for Linux.
Nicola has now released Version 0.66.1 the software as .deb; .rpm and manual installers.

A motor-focuser-adapted Bresser Messier AR 102xs f/4.5 ED refractor was mounted on a Celestron AVX GOTO mount and a SVBONY SV305 camera, fitted with a light-pollution filter, was placed at the prime focus. AstroDMx Capture for Linux, running on an Ubuntu Linux laptop was used to capture 12 bit data into 16 bit Tiff files at three exposures (5s x 20; 14s x 30; 40s x 10) with matching dark-frames. Each set of images was stacked in Registax 5.1 and the resulting images were themselves stacked in Registax and also separately combined in Flexible Image Combine. The final result was post processed in Glimpse (a fork of the Gimp), Fitswork, FastStone and Neat Image.

Screenshot of AstroDMx Capture for Linux capturing 16 bit data on the Orion nebula with the SV305

The Orion nebula captured by the SV305 with AstroDMx Capture for Linux

The data were hastily captured in a clear sky that according to the weather forecast, was supposed to be dense clouds. The clear patch lasted just long enough to gather the data using the equipment that was closest to hand. Further tests will be done with a Newtonian reflector.

Tests so far show that the low cost SV305 is a very stable camera that will be equally suitable for Deep-sky imaging as well as solar system imaging.

12% crescent Moon with an SVBONY SV205 and a 102mm refractor with AstroDMx Capture for Linux

The SV205 is an 8 Mp, USB 3.0 camera with pixel vignetting. New firmware for the camera has enabled it to be recognised as a USB 3.0 device by Linux.  A motor-focuser-adapted Bresser Messier AR 102xs f/4.5 ED refractor was mounted on a Celestron AVX GOTO mount and the SV205 camera was placed at the prime focus. AstroDMx Capture for Linux, running on an Ubuntu Linux laptop, was set to map to greyscale and used to capture a 1000-frame SER file of the 12% waxing, crescent Moon in a twilight sky, with real-time flat-field correction to correct for the pixel vignetting. A capture frame-rate of about 13fps was maintained during the capture. The capture resolution was 3264 x 2448.

Screenshot of AstroDMx Capture for Linux capturing data from the SV205

The best 90% of the frames in the SER file were stacked in Autostakkert! 3.1, wavelet processed in Registax 5.1 and post processed in Glimpse (a fork of the Gimp).

12% waxing, crescent Moon

Closer view

The SV205 is a challenging camera, but it was possible to obtain pleasing results using this fast refractor. In future, testing will be done with a Maksutov to test the high resolution capture, which is what this camera is really for. Mapping to greyscale reduces the file-size to 1/3 of the full-colour image, which facilitates capture rates. With the Moon, greyscale is frequently used for image capture.

A China driven future Increase in Linux use for astronomy?

It seems highly probable that Linux will rise in popularity in China, (a country with a population of 1.43 billions, the largest national population in the world), in a very short time.

The two biggest OS (operating system) makers in China (China Standard Software (CS2C) and Tianjin Kylin Information (TKC)) recently announced plans to  build jointly a new "domestic operating system." CS2C created China’s Windows XP clone called NeoKylin OS which supports all of the major Chinese CPUs. TCK is looking after Kylin, China’s first home-produced OS. China’s National University of Defence Technology began the development of Kylin in 2001. It was named after the mythical beast Qilin, depicted in their logos. Originally Lylin was based on FreeBSD, but from version 3, has been Linux based.

China continued building its own operating system to replace Microsoft Windows or iOS in 2013, with technical support from the British company Canonical Ltd. the company behind Ubuntu. An agreement was reached between Canonical Ltd. and The Ministry of Industry and Information Technology of the People's Republic of China to create together and release an Ubuntu-based operating system targeted at the Chinese market. Canonical Ltd. was founded by South African, Mark Shuttleworth, the first African in Space. Ubuntu is dubbed by Canonical, 'Linux for human beings'.

The Chinese OS is Ubuntu-Linux-based and is called Ubuntu Kylin and has been described as "a loose continuation of China's Kylin OS". The first version was released on 2013-04-25 and was based on the Raring Ringtail 13.04 version of Ubuntu using the Linux kernel 3.8. At the time of writing, the latest version of Kylin is based on the 19.10 Eoan Ermine version of Ubuntu using the Linux kernel 5.3. Kylin uses the UKUI (Ubuntu Kylin User Interface) lightweight desktop environment which is very easy for a previous user of Windows to move over to use. UKUI is intended to resemble Windows 7. Kylin developers say that ‘most Chinese users are more familiar with interfaces similar to Windows.’

Ubuntu Kylin desktop

AstroDMx Capture for Linux splash screen in Ubuntu Kylin

AstroDMx Capture for Linux streaming data from a ZWO ASI178MC camera in Ubuntu Kylin

Another Chinese Linux OS is Deepin. Until 2015 Deepin was Ubuntu based, but since then has been Debian based. Deepin has its own desktop environment called DDE or Deepin Desktop Environment which is based on the Qt 5 toolkit. Its intuitive design makes it also a suitable distribution with which to migrate away from Windows. The development of Deepin is led by China-based Wuhan Deepin Technology Co., Ltd.

The 'Beautiful' mode of the Deepin DDE desktop

This mode bears a strong resemblance to macOS

The launch window in 'Beautiful' mode

Deepin's 'Efficient' desktop mode, resembling Windows

AstroDMx Capture for Linux splash screen in Deepin Linux

My personal preference is for the Deepin distro with it's two DDE desktop modes.

Why is all of this important?

China has ordered that foreign computer software and hardware be removed from government and public offices within three years starting in 2020. This involves 20-30 million pieces of hardware.
As schools, universities, medical centres, official offices etc. move away from Windows driven machines to Linux, it will be a natural move for people to move over to the Linux operating systems as they will not be using Windows. Moreover, Chinese computer manufacturers could be moving to producing Linux machines rather than the Windows machines we see at the moment.

All of this leads one to conclude that Linux is rapidly going to grow in use in China and therefore concurrently, Linux powered astronomy will follow. Of course, using Wine, Chinese Linux users will still be able to use many of their Windows applications, but not, however, capture software.

Software such as our own AstroDMx Capture for Linux already runs on the two popular Chinese Linux operating system Ubuntu Kylin and Deepin Linux.

It will be interesting to watch the increased use of Linux by Chinese astronomers as well as astronomers across the globe.

In the meantime SVBONY have supplied us with a Linux SDK for the SVBONY SV305 and Nicola is working on the implementation of this camera in AstroDMx Capture for Linux.

Further maintenance release of AstroDMx Capture for Linux, version 0.64.4

Nicola has released a further maintenance release of AstroDMx Capture for Linux.
This is version, 0.64.4. and was needed to resolve a remaining issue.

Maintenance release of AstroDMx Capture for Linux, version 0.64.3

Nicola has released a maintenance release of AstroDMx Capture for Linux.
This is version 0.64.3
This was necessary because of a fault in the latest QHY SDK which rendered some QHY cameras unstable and likely to drop their connection.

It is hoped that a new version of AstroDMx Capture for Linux, fully supporting the SVBONY SV305 camera will soon be released, when SVBONY have fixed their Linux SDK for 12 bit (16 bit) support.

Tests with the latest version of Elementary OS, 5.1, Hera, show that AstroDMx Capture for Linux now installs and runs properly from the menus. With earlier versions of the OS, the program would only run from the command line.