Remerciez-le!

Remerciez @Admin pour avoir partagé cet document gratuitement, de la manière la plus simple, en partageant sur les réseaux sociaux.

PHD2 v2.6.1 User Guide January 26, 2016 2 4 5 5 5 5 7 7 7 8 8 8 9 9 10 10 10 10

PHD2 v2.6.1 User Guide January 26, 2016 2 4 5 5 5 5 7 7 7 8 8 8 9 9 10 10 10 10 11 12 13 13 13 14 16 17 17 17 18 18 19 19 20 20 20 22 24 25 28 28 28 30 30 30 30 32 32 32 33 34 34 35 40 40 41 41 42 43 43 45 45 Table of Contents Table of Contents Introduction Main Screen Basic control Menus Status Bar Using PHD2 Guiding Equipment Connection Camera Selection Support for SBIG dual-chip cameras Mount Selection Aux Mount Selection Adaptive Optics and Rotator Selections Simulators Equipment Profile Exposure Time and Star Selection Automatic Calibration Conventional Mounts Adaptive Optics Devices Guiding Dark Frames and Bad-pixel Maps Introduction Dark Frames Bad-pixel Maps (Defect Maps) Reusing Dark Frames and Bad-pixel Maps Visualization Tools Overlays Graphical Display Stats Star Profile and Target Displays Adaptive Optics (AO) Graph Dockable/Moveable Graphical Windows Advanced Settings Global Tab Camera Tab Guiding Tab Algorithms Tab Other Devices Tab Guide Algorithms Guiding Theory Guide Algorithm Parameters Tools and Utilities Manual Guide Auto-Select Star Calibration Details PHD2 Server Dithering Logging and Debug Output Drift Align Lock Positions Comet Tracking Guiding Assistant Managing Equipment Profiles Advanced Settings for the Simulators Multiple Program Executions Keyboard Shortcuts Table of PHD2 keyboard shortcuts Trouble-shooting and Analysis Calibration and Mount Control Problems Display Window Problems Camera Timeout and Download Problems 2 46 46 47 47 48 Poor Guiding Performance Alert Messages Log Analysis Guiding Log Contents Problem Reporting 3 Introduction PHD2 is the second generation of Craig Stark's original PHD application. PHD has become a fixture of the amateur astronomy community with more than a quarter million downloads. From its inception, it has successfully embraced three seemingly conflicting objectives: 1. For the beginning or casual imager, to deliver ease of use and good guiding performance "out of the box" 2. For the experienced imager, to deliver sophisticated guiding algorithms, extensive options for tuning, and broad support for imaging equipment 3. For all users, to consistently exhibit a commercial level of quality while being available free of charge In order to extend PHD to more platforms and further expand its capabilities, Craig released his program to the open-source community, and PHD2 is the direct result of that generosity. It has been substantially restructured to make it more extensible and supportable going forward. Moreover, the initial release of PHD2 already includes a substantial number of new features and refinements while retaining all the core strengths of the original. Users of the new PHD2 can be confident it will remain committed to the three objectives that made the original application so successful. 4 Main Screen The PHD2 main window is designed for ease of use and clarity. Its intent is to support a quick and natural sequence of interactions to start and control guiding. The basic steps for doing this are as follows: 1. Connect to your guide camera and mount 2. Start a sequence of guide exposures to see what stars are available in the field of view 3. Choose a guide star and calibrate the guider 4. Continue guiding on the target star while using various display tools to see how things are going 5. Stop and resume guiding as necessary The majority of the screen is taken up by the display of the star field from your guide camera. The display is automatically adjusted for size, brightness, and contrast so you can have a clear view of available stars. However, these adjustments are done only for display purposes. Internally, PHD2 operates on the raw, un-adjusted data in order to maximize guiding accuracy. This display is also used to select a guide star by simply clicking on it. You should definitely adjust the slider control so you can see even the faintest stars in the field. Basic control Near the bottom of the screen are the main controls. PHD2 is largely controlled by these buttons and sliders, with additional pull-down menus at the top of the window for more detailed functions. Moving from left to right in the window, the primary buttons are as follows: 1. The USB connector icon - used to connect to your camera and mount devices 2. The Loop icon - used to start a sequence of repeated exposures with the guide camera ("looping"), with each resultant image (guide frame) being displayed in the main window. If guiding is subsequently started, clicking on the 'loop' icon again will pause guiding while continuing to take guide exposures. 3. The PHD2/Guide icon - used to start calibration, if needed, and then to start guiding on the selected star. 4. The Stop icon - used to stop both guiding and looping To the right of the stop icon is a pull-down list of exposure durations (0.01s - 15s). You use this control to quickly set the guide camera's exposure duration. If your camera does not support an exposure duration, PHD2 will do its best to emulate that duration. For example, if you use a short-exposure webcam, your maximum true exposure duration might be only 1/30th of a second. If you select one second as the desired exposure time, PHD2 will automatically acquire images for one second and stack them on the fly to create a composite image for guiding. The next control to the right is a slider for adjusting screen stretch and contrast, essentially a "gamma" adjustment. PHD2 automatically adjusts the display accounting for the darkest and brightest pixels in the image, and the slider is used to fine-tune the display to better see the stars in the field of view. This may be useful, for example, if you are trying to focus the guide camera for the first time and need to see the large, out-of-focus star image. Moving the gamma slider only makes the display brighter or dimmer for your viewing. PHD2 always uses the raw pixels from the camera for guiding, and moving the gamma slider has no effect on guiding. A display of "completely white" or "completely black" is usually an indication that no stars are available in the field of view. Next to the gamma slider is the "brain button." This button brings up an Advanced Dialog for making detailed adjustments to PHD2's guiding operations. An important design goal of the program is to minimize your need to change these parameters, but "the brain" is nothing to be feared - there are adjustments available here that can significantly improve your guiding results and make your life easier. Over a period of time, you should take a look at this dialog and learn what it can do for you. The rightmost control in this row is a "camera properties" button. This may be disabled (grayed out) depending on the type of guide camera you have selected. If it is enabled, you can click on it to set various parameters that are unique to that type of camera - binning and specialized gain settings are examples of such parameters, but there could be others depending on the camera. Menus The pull-down menus above the main guider display are used to access a variety of functions. These are described in the Darks, Tools and Utilities, and Visualization sections of this help document. Status Bar The status bar at the bottom of the main window is used to display messages and status information that will help you keep track of guiding operations. For example, the rightmost three panels 5 on the status bar will show you whether the camera and mount are connected and whether the guider has been successfully calibrated. 6 Using PHD2 Guiding There are five basic steps to start guiding. 1. Press the USB-icon button and connect to your guide camera and mount. 2. Pick an exposure duration from the drop-down list. 3. Hit the loop button and look at the available stars, adjusting focus if necessary. Move the mount or adjust the exposure duration as needed to find a suitable guide star. 4. Click on a non-saturated star that's not very near an edge for use as the guide star. 5. Press the PHD2 Guide button. Details of these operations will be described in the sections below. Equipment Connection Exposure Time and Star Selection Calibration Guiding Equipment Connection In order to begin guiding, PHD2 must first connect to your hardware: the guide camera, the mount, and, optionally, an 'aux' mount, an adaptive optics (AO) device, or a rotator. When you click on the USB icon, you'll see a dialog that looks like this: Camera Selection The Camera drop-down list shows all the camera types currently supported by PHD2. In all cases, the OS-level drivers for the camera must be installed correctly in order for PHD2 to connect to the device. If the camera uses an ASCOM interface, you'll also need to install the corresponding ASCOM driver for the camera. If you don't see your ASCOM-compatible camera shown in the drop-down list, you probably don't have the ASCOM driver installed. Neither uploads/Geographie/ phd2-user-guide.pdf