Allsky1 Camera System at Starlight Cascade Gardens & Observatory
Page Created: 2003 September 03
Page Last Updated: 2020 February 18
Most recent image (updates hourly for now):|
172066 Aug 10 08:30 image-resize.jpg
AllSky1 Camera SystemWelcome to Starlight Cascade Observatory Night AllSky1 Camera Page!
Near Yarker, Ontario, Canada.
(44.22.39 N 76.45.47 W 151M Elevation)
Version3: 2019Dec12- ZWO ASI120MC camera and a Raspberry Pi 3b, 1280x960 pixels colour USB2.0, ASI –150° Lens Adapter for use as an all-sky camera 1/3" 2.1mm lens, $22USD. Based on the project: http://www.instructables.com/id/Wireless-All-Sky-Camera/
Version2: 2006Dec-2018July Under the dome SBIG ST237A at SCGO consists of an SBIG ST237A camera (parallel port and control box interface) with an integrated wide angle lens, mounted on an 8' post attached to the SCG Observatory, taking 90 second exposures all night long. 657x495 pixels monochrome, camera controller. This ST237A system was a donation from Dr. Robert Nemiroff in late 2006. It is based on the CONCAM system, used around the world in various observatories. the camera
Version1: (2003-2006) consisted of a downward looking PC Supercircuits low light camera and a reflective hemispherical mirror - the system sensitivity was not good.
Ths system barely picked up all of the stars in the Big Dipper. Version2 routinely picks up the Milky Way Galaxy.
Relatively realtime dataIf any of these images are empty, this generally means that the system was not active the night before or that image processing has gone wrong :) Up is approximately North, East is Left, West is Right and South is down.
|Complete Image Archives of:|
Allsky Camera images stored in folders by date (JPGs since 2007, PNGs since 2012aug09).
Complete Daily Animated .AVI 2014Dec11 and newer) #avi's in online archive: 0
Collection of midnight images from 2007 #midnights: 0
Most Recent Special Events
AMS Report 1790
Allsky1 90 sec exp
Allsky1 90 sec exp
Allsky2 compilation image
Allsky2 .AVI video (8sec 5mb)
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Allsky 90 sec exp
Allsky2 compilation image
Allsky2 .mp4 video (10 sec 16mb)
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The event images before and during.
|Allsky1 System Log|
| width | 0 | 0 means max width. Look up your camera specifications to know what values are supported | | height | 0 | 0 means max height. Look up your camera specifications to know w hat values are supported | | exposure | 10000 | **Night** time exposure in milliseconds. During the day, au to-exposure is used. | | maxexposure | 20000 | This is the maximum exposure for **night** images when u sing auto-exposure. During the day, auto-exposure is always used. | | autoexposure | 1 | Set to 0 to disable auto-exposure at **night**. Auto-exposu re delivers properly exposed images throughout the night even if the overall bri ghtness of the sky changes (cloud cover, moon, aurora, etc). When set to 1, *max exposure* value will be used as the delay between timelapse frames. | | gain | 50 | Gain for **Night** images. Varies from 0 to 600. During the day, g ain is always set to 0 | | maxgain | 200 | Maximum gain for **night** images when using auto-gain.| | autogain | 0 | Set to 1 to allow auto-gain at **night**. This mode will adjust the gain of night images when the overall brightness of the sky changes (cloud cover, moon, aurora, etc). **Avoid using autoexposure and autogain together** as it produces unpredicatble results (dark frames, but not always).| | gamma | 50 | Varies between 0 and 100. This setting increases or decreases con trast between dark and bright areas. | | brightness | 50 | Varies between 0 and 100. This setting changes the amount of light in the image. | | wbr | 53 | Varies between 0 and 100. This is the intensity of the red componen t of the image. | | wbb | 90 | Varies between 0 and 100. This is the intensity of the blue compone nt of the image. | | bin | 1 | bin 2 collects the light from 2x2 photosites to form 1 pixel on the image. bin 3 uses 3x3 photosites, etc. Increasing the bin results in smaller ima ges and reduces the need for long exposure. Look up your camera specifications t o know what values are supported | | delay | 10 | Time in milliseconds to wait between 2 frames at night. | | daytimeDelay | 5000 | Time in milliseconds to wait between 2 frames during the day. | | type | 1 | Image format. 0=RAW 8 bits, 1=RGB 24 bits, 2=RAW 16 bits | | quality | 95 | Compression of the image. 0(low quality) to 100(high quality) f or JPG images, 0 to 9 for PNG | | usb | 40 | This is the USB bandwidth. Varies from 40 to 100. | | filename | image.jpg | this is the name used across the app. Supported extensi ons are JPG and PNG. | | flip | 0 | 0=Original, 1=Horizontal, 2=Vertical, 3=Both | | text | text | Text overlay. **Note**: It is replaced by timestamp if time=1 | | textx | 15 | Horizontal text placement from the left | | texty | 35 | Vertical text placement from the top | | fontname | 0 | Font type for the overlay. 0=Simplex, 1=Plain, 2=Duplex, 3=Comp lex, 4=Triplex, 5=Complex small, 6=Script simplex, 7=Script complex | | fontcolor | 255 255 255 | Font color in BGR | | smallfontcolor | 0 0 255 | Small Font color in BGR | | fontsize | 0.7 | Font size | | fonttype | 0 | Controls the smoothness of the fonts. 0=Antialiased, 1=8 Connec ted, 2=4 Connected. | | fontline | 1 | font line thickness | | latitude | 60.7N | Latitude of the camera. N for North and S for South | longitude | 135.05W | longitude of the camera. E for East and W for West | | angle | -6 | Altitude of the sun above or below the horizon at which capture s hould start/stop. Can be negative (sun below horizon) or positive (sun above hor izon). 0=Sunset, -6=Civil twilight, -12=Nautical twilight, -18=Astronomical twil ight. | time | 1 | Replaces the text overlay | | darkframe | 0 | Set to 1 to enable dark frame capture. In this mode, overlays are hidden and the image is saved as dark.png by default | | showDetails | 1 | Displays the exposure, gain and temperature in the overlay | The second file called **config.sh** lets you configure the overall behavior of the camera. Options include functionalities such as upload, timelapse, dark fram e location, keogram. | Configuration | Default | Additional Info | | ----------- | ----------- | ----------------| | UPLOAD_IMG | false | Set to true to upload (ftp) the current image to a server (website, blog, host, etc) | | UPLOAD_VIDEO | false | Set to true to upload the timelapse to a server | | POST_END_OF_NIGHT_DATA | false | Set to true to send some data to your server at the end of each night | | TIMELAPSE | true | Build a timelapse at the end of the night | | KEOGRAM | true | Builds a keogram at the end of the night | | UPLOAD_KEOGRAM | false | Set to true to upload the keogram to your server | | STARTRAILS | true | Stacks images to create a startrail at the end of the nigh t | | BRIGHTNESS_THRESHOLD | 0.1 | Brightness level above which images are discarded (moon, head lights, aurora, etc) | | UPLOAD_STARTRAILS | false | Set to true to uplad the startrails to your server | | AUTO_DELETE | true | Enables automatic deletion of old images and videos | | NIGHTS_TO_KEEP | 14 | Number of nights to keep before starting deleting. Needs AUTO_DELETE=true to work. | | DARK_FRAME | dark.png | Path to the dark frame use for hot pixels subtraction. | | DAYTIME | 1 | Set to 0 to disable daytime liveview. | | CAMERA_SETTINGS | /home/pi/allsky/settings.json | Path to the camera settings file. **Note**: If using the GUI, this path will change to /var/www/html/setting s.json | In order to upload images and videos to your website, you'll need to fill your F TP connection details in **ftp-settings.sh** ```shell nano scripts/ftp-settings.sh ## Dark frame subtraction !(http://www.thomasjacquin.com/allsky-portal/screenshots/darkframe.jpg) The dark frame subtraction feature was implemented to remove hot pixels from nig ht sky images. The concept is the following: Take an image with a cover on your camera lens and subtract that image later to all images taken throughout the nig ht. You only need to follow these instructions once. Manual method: * make sure config.sh has a DARK_FRAME configuration. Default is "dark.png" * Place a cover on your camera lens/dome * Set darkframe to 1 in settings.json * Restart the allsky service: ```sudo service allsky restart``` * A new file has been created at the root of the project: dark.png by default * Set darkframe to 0 in settings.json * Restart the allsky service: ```sudo service allsky restart``` * Remove the cover from the lens/dome !(http://www.thomasjacquin.com/allsky-portal/screenshots/keogram-annotated.jpg ) A **Keogram** is an image giving a quick view of the night activity. It was orig inally invented to study the aurora borealis. For each image taken during the night, a central vertical column 1 pixel wide is extracted. All these columns are then stitched together from left to right. Thi s results in a timeline that reads from dusk to dawn. To get the best results, you will need to rotate your camera to have north at th e top. That way, using a fisheye lens, you end up with the bottom of the keogram being the southern horizon and the top being the northern horizon. Note that it will only show what happens at the meridian during the night and wi ll not display events on the east or west. The program takes 3 arguments: - Source directory - File extension - Output file ## Startrails !(http://www.thomasjacquin.com/allsky-portal/screenshots/startrail.jpg) **Startrails** can be generated by stacking all the images from a night on top o f each other. The program takes 4 arguments: - Source directory - File extension - Brightness treshold to avoid over-exposure: 0 (black) to 1 (white). - Output file Example when running the program manually: ``` ./startrails ./images/20180223/ jpg 0.15 ./images/20180223/startrails.jpg ```
|Image Archives of:|
Allsky Camera Image Archive stored in folders by date. #days/folders: 0
Animated .AVI #gifs: 0
There is a 18watt wire wound resistor heating the dome interior powered by a 24VDC wall adapter controlled by a mechanical timer running only from 18:00-06:00 local time. The dome has two vent holes in its base where a small computer muffin fan (1 watt) runs 24/7, providing circulation into the lower housing which holds the camera, cables and connection points. The USB 5m active repeater is not in use at this time. Bugs do get into the housing which needs to be sealed better. Images are captured by CCDOPs software running on a Windows XP workstation saving the images to a linux file server. The camera and the heater shutdowns down near sunrise and starts up before sunset and runs on a mechanical 110vac timer.
Our latest system went live in 2006 December. These images are of the system as of 2008 August.
Meteor Event Archive
before during after all in 90 second exposures. - http://amsmeteors.org/fireball_report/
Here are the three images integrated into an animated .GIF (561kb)
before during after - http://amsmeteors.org/fireball_report/
all in 120 second exposures.