MetaGuide has a novel proactive guiding feature that allows it to phase lock onto a specified error signal in the drive and anticipate the coming corrections. This is intended to aid in the reduction of fast s terms in the PE that are hard to remove with PEC. Since MetaGuide requires streaming video, it does not work with long exposure web cams - which would defeat its purpose anyway. MetaGuide requires no guider connection for its core collimation and diffraction analysis features, but as a guider or metaguider, it requires a Shoestring parallel or GPUSB connection.
Compatible cameras: Currently the only web-cams supported are Toucam Pro and NexImage, but any web-cam that can output x in I format should work. Modified web-cams are not supported; MetaGuide relies on high speed streaming video to correct for seeing. PHD Guiding is designed to be "Push Here Dummy" simple, yet provide powerful, intelligent auto-guiding of your telescope. Connect your mount, your camera, select a star, and start guiding. That's it! Despite actually having a Ph. This is especially tough when standing out in a cold field late at night when all you really want to do is stay warm and collect good images of your DSO.
In PHD Guiding, all calibration is taken care of automatically. You do not need to tell it anything about the orientation of your camera, nor do you need to tell it anything about the image scale.
The automatic calibration routine takes care of this for you. Once your images are calibrated, aligned and stacked, you will want to correct for things such as color balance, and increase the contrast to make faint details more visible. You will probably also want to apply some type of noise reduction, and you may want to apply more sophisticated enhancement techniques. However, at this stage of image processing, many astrophotographers prefer to switch to a general image processing program such as Photoshop.
For long-exposure deep-sky astrophotography, guiding during the exposure can be very useful in producing higher quality images. By manually or automatically following a star by making corrections in right ascension and declination higher tracking accuracy is obtained. Autoguiding involves using a separate CCD or Webcam to monitor a stars position and then send corrections to the telescope's mounting to guide or follow the star with high accuracy to compensate for inaccuracies in the mount's tracking.
These units have been discontinued but can be found used on Astromart. CCD cameras and webcams can be also be used as autoguiders, but software, such as GuideDog and PHD, is required to run on a computer that interfaces between the autoguider and mount. These programs perform useful functions like allowing you to open FITS format files, perform noise reduction, and create thumbnails for indexing and archiving. These filters and actions work inside of Photoshop and perform specialty functions for astronomy, such as gradient and noise reduction.
Articles in book and video format teach you how to do astrophotography, and use programs such as Images Plus for image calibration and Photoshop for image correction and enhancement. Planetarium programs and atlases let you find out what is up in the sky, and plan your observing and astrophotography session.
Midnightkite also has a nice collection of links to lots of other astronomical related software for a variety of operating systems. Software for Astrophotography You don't really need a computer and software at the telescope to shoot astrophotos. It can be used with dedicated astronomy cameras, webcams and USB frame grabbers.
Software-Assisted Focusing The latest generation cameras allow focusing through the camera manufacturer's software. Image Acquisition Automation Serious deep-sky astrophotography requires shooting many short exposures.
Plate Solving There are several free pieces of software that will take an image a short exposure and "plate solve" it for you. Image Calibration, Aligning and Stacking Advanced astronomical imaging requires the "calibration" of the raw original images. You will also need to align your images so that the stars in them line up perfectly. Image Correction and Enhancement Once your images are calibrated, aligned and stacked, you will want to correct for things such as color balance, and increase the contrast to make faint details more visible.
Autoguiding Software For long-exposure deep-sky astrophotography, guiding during the exposure can be very useful in producing higher quality images. Photo Utilities These programs perform useful functions like allowing you to open FITS format files, perform noise reduction, and create thumbnails for indexing and archiving.
Photoshop Filters and Actions These filters and actions work inside of Photoshop and perform specialty functions for astronomy, such as gradient and noise reduction. They are now available in the download section. Make sure you use a firewall like Guarddog along with Guidedog, and don't go exposing your LANs naked to the world.
Other than that have fun, test it out and report any bugs to me. In any bug reports make sure you say which distribution and version of KDE you are using. There is no manual or tutorial for Guidedog. Guidedog is intended to work along side any iptables based firewall, and as such compliments Guarddog nicely.
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