Deep Sky Imager™: The Basics - Meade

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$RB-60 Refracting Telescope - Meade$

Drizzle Tutorial #1 This tutorial demonstrates the basic operation of Drizzle and how you get started. The following tutorial assumes that you have the imager on the telescope pointed at a Deep Sky object properly focused and that dark frames have been taken up to the longest desired exposure time. Recommended settings File Type -> FITS3P Save Options -> Save All Uncombined Images The above settings are highly recommended. FITS3P will save the full dynamic range of the imager and “Save All...” will allow you to run the images back through drizzle offline allowing you to try different settings. These setting are found by pressing the Save Proc... button on the imager tab. 1. Select “Drizzle” from the “Image Process” dropdown menu. 2. Enter a name in the Object Name box. 3. Set Min Quality and Evaluation Count as desired. Press the Settings button. See the Drizzle Resolutions section of this document for a description of these settings. These settings are not critical if you used the recommended settings above because you will be able run the images back through drizzle off line. 4. Start autotracking Follow the directions in the manual on page 31 and set up your Meade Telescope for autotracking/Guiding. Be sure the Imager pull down in the Telescope tab is set to the imager you are using for drizzle. The imagers are identified by name. More... Drizzle Tutorials 40
5. Select 2 stars The first star selected will be the shift star this is the position that will be shifted for subsequent images. This is also the star that will be used for telescope tracking. The second star is to determine the rotation angle from the first star. It is important to pick stars that are close to the center. Keep the selection within the middle third of the image, this way the telescope control will have maximum shift space. The telescope control will not shift the selected stars out of the image. When you run the images off line you can select different stars. If your telescope is polar mounted and well aligned you can use a single star, this will give you the maximum field of view possible. 6. Press Start Envisage will create a new tab and put the drizzled image there. Be patient, depending on your Drizzle settings and the speed of your computer it may take 2030 seconds after the count down for the first image to appear. The image may be bigger than your screen, in this case scroll bars will appear on the right and bottom. 7. Telescope Tracking If you select the live image you will see your selected stars and a yellow circle with a cross. This is the target position. If your star was on the yellow cross when Start was pressed then the yellow cross will be in the upper right corner. More.... Drizzle Tutorials 2 41
Page 1 and 2: Deep Sky Imager : The Basics Color
Page 3 and 4: Install the Autostar Suite Software
Page 5 and 6: Start the Suite Software If the Aut
Page 7 and 8: To open the Envisage Imaging progra
Page 9 and 10: Key to Envisage Controls 1. Gain an
Page 11 and 12: more... 6. An image should be alrea
Page 13 and 14: What Happens When You Press Start 2
Page 15 and 16: An example of taking a picture of a
Page 17 and 18: The Parfocal Ring 1 It is extremely
Page 19 and 20: Automatic Adjustment Controls 1 Gai
Page 21 and 22: Image Processing Controls 1 Setting
Page 23 and 24: Image Processing Controls 3 Image A
Page 25 and 26: Magic Eye Focus The Magic Eye Focus
Page 27 and 28: Time-Lapse Settings Envisage softwa
Page 29 and 30: Tracking Boxes and Centroids Drawin
Page 31 and 32: Autoguider and Telescope Controls 1
Page 33 and 34: Other Features Autoguider and Teles
Page 35 and 36: Dark Frames is a useful feature for
Page 37 and 38: Make a Movie of the Rotation of Jup
Page 39: Color Filters and the Black and Whi
Page 43 and 44: 2. Select images Select the first i
Page 45 and 46: 11. Final Stretch. Once the image i
Page 47 and 48: Description of Drizzle 2 In the Dri
Page 49 and 50: Extended View Description of Drizzl
Page 51 and 52: Description of Drizzle 6 51
Page 53 and 54: Multiple Cameras: The latest softwa
Page 55 and 56: DSI II Features The following featu
Page 57 and 58: This document and the Meade Autosta

Deep Sky Imager™: The Basics - Meade

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