Next: Sky Subtraction Up: Construction of Flat Previous: Standard construction . For a number of projects where very deep integrations and accurate flat fields are required, and the targets are point sources or much smaller than the frame size, the sky background itself can be used to calculate the flat field. ... Use STATISTICS/IMAGE to calculate the image median, and COMPUTE/IMAGE to divide by this to get the normalised flat field. ...

... This calibration approach is recommended when dealing with high frequency data from the old ATCA correlator, especially at 3mm wavelengths. ... The approach described here exploits the dual frequency bands that were available with the old correlator. ... Rather the current approach assumes that you have a single Miriad dataset containing bandpass calibrator, phase calibrator, flux density calibrator and program source. ... MFCAL . ... Input multi-source, dual-band dataset. select=source(1921-293) . ...

Fasti is an innovative design for infrared detector control. ... to use largely accepted standards as boundaries, as a PCI bus, a parallel interface or a serial, and to use few of them . ... The building blocks of Fasti are: . ... the serial bus for controlling housekeeping devices (temperature and pressure sensors or motor controllers) and programming data acquisition . ... Though not so fast, and lacking some forms of data integrity check, this bus is so widely used to be nearly unavoidable. ...

... Meade Instruments Corporation . ... Autostar Computer Controller Instruction Manual . Autostar Computer Controller . ... NOTE: This manual covers both Model #495 Autostar and #497 ETX Autostar Computer Controllers. ... Autostar Primary Menus and Options . ... Chapter 3: Alignment . ... Guided Tour Menu . ... Chapter 5: Autostar Menu Functions . ... Meade Autostar Computer Controller . ... Meade #505 Connector Cable Set Manual . ... Copyright 2006 Meade Instruments Corporation, All Rights Reserved. ...

... Helpful Computer Hints for Survival in this Class . ... Solar Radiation Data Base . Electronic Energy Journal . ... Answers to the First Midterm The Second Homework Assignment . ... WEEK #1 BASIC OVERVIEW OF THE PROBLEM . ... WEEK #2 SOLAR ENERGY BASICS . Solar Energy: Incident Energy on the Earth's Surface . ... WEEK #3 SOLAR ENERGY: ENERGY STORAGE and PHOTOVOLATIC CELLS . ... WEEK #4 SOLAR ENERGY: OTHER USES . ... WEEK #5 ENERGY STORAGE SYSTEMS . ... WEEK #9 PLANTS, POLLUTION AND PHYSICS . ...

Target Acquisition Reference Information . Figure 7.1 on page 88 shows mean predicted count rates as a function of (B - V) 0 color for the four acquisition mirrors. Also shown are the fits to the predicted count rates for different amounts of reddening. ... You can estimate target acquisition count rates using the plots instead of Table 7.1 on page 92 : . ... Read from the Figures (depending on the mirror used) the predicted count rate. ...

Blackholes Forum Message . Forums: . ... Alternative Idea . ... With the proposal of exotic super dense entities like quark stars and others including black holes, matter on the atomic level can, and most likely does, break down to its most simplist building blocks (photons, leptons, quarks, etc). ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

XmTel is intended for interactive remote telescope operation. ... The command set provides for several basic functions that enable slewing, pointing, fine guiding, and control of the telescope focus, reticle, and fans. ... XmTel is actively being used and developed with the Celestron Corrected Dall-Kirkham C20 telescope. ... Some NexStar features of the C20 -- the fan, temperature reading, and focus control -- are not presently available on other Celestron telescopes. ...