... See spectral jumps at 2^n channels Intro for a description of pshift,pfb, term s . ... pshift . ... 0x1ff5 . ... 0x1555 . ... noise pshift . ... noise pshift, first butterfly no shift . ... 0x1555 shift every other butterfly (this should work for noise) . ... the black trace has pshift=0x1ff5 (the current standard). the red trace uses 0x1555. shift every other butterfly (with a shift on the first butterfly) . ... When a pshift of 0x1555 is used (shift every other butterfly) no jumps are seen . ...

... Next: Star Finding and Up: Image Restoration and Previous: Multiresolution and Astronomical . ... Design improvements continue to be made in the filter developed using mathematical morphology principles for the Infrared Astronomical Satellite ( IRAS ) images. The purpose of this filter is to eliminate Galactic cirrus emission from extragalactic fields. ... With an appropriate normalization, the filter curve was applied to each pixel in the image to remove the Galactic cirrus. ...

The shutter is a two-blade mechanism used to control the duration of the exposure. A listing of the possible exposure times is contained in Table 2.3 . ... However, an exposure time shorter than the minimum allowed (0.11 seconds) is, instead, rounded up to this minimum value. ... The AP-17 always controls the shutter closing if the serial clocks are enabled during the exposure (CLOCKS=YES), which then has a minimum planned duration of 1 second, and exposures are rounded to the nearest second. ...

... Driver ID: GPS-HP . ... This driver supports the HP 58503A Time and Frequency Reference Receiver. ... It receiver should be operated with factory default settings. Initial driver operation: expects the receiver to be already locked to GPS, configured and able to output timecode format 2 messages. The driver uses the poll sequence :PTIME:TCODE? to get a response from the receiver. ... Specifies the driver reference identifier, an ASCII string from one to four characters, with default GPS . ...

MRO Delay Line Socket Initialisation Protocol for Delay Line Computers E. B. Seneta bodie@mrao.cam.ac.uk rev 1.0 13 October 2006 Cavendish Laboratory JJ Thomson Avenue Cambridge CB3 0HE UK Objective To describe the protocol by which network connections are to be made and broken between delay line computers. Scope This document describes how to make and break network connections for the purpose of sending and receiving delay line command, command data, status and telemetry messages. ...

... Like the Lynxx and the ST-4, this camera has a preferred orientation with the telescope (see figure 4). ... Before taking images, the camera and the telescope have to be calibrated. ... This is the normal CCD camera image mode. The second method is the track and accumulate mode. In this mode, the camera takes several short images, and then adds them together to give an image that is comparable to the same total time image as taken by the grab function. ...

... Figure: A dark current CCD exposure with cosmic ray events which are removed with non--linear filters. ... Figure shows a CCD dark current exposure with cosmic ray events. ... Figure: Removal of cosmic ray events on a CCD spectral exposure with different techniques: (A) original, (B) median filter, (C) recursive filter and (D) stack comparison. ... For comparison with non--linear filter techniques, Figure D shows removal of cosmic ray events from the spectral frame discussed above. ...

... The SAS_ODF environment variable shall be set to the summary file produced by odfingest , or to a directory containing the data, and access to calibration files shall be set through cifbuild . ... step 3 The count rates of tracking stars are written into a file. omthconv thxset =/path_to_your_data/proc/I0125321001OMS006TRHIS0000.FIT nphset =/path_to_your_data/0644_0125321001_OMX00000NPH.FIT outset =/path_to_your_data/proc/P0125321001OMS006TSTRTS000.FIT . ... A sky image (North on top) is produced. ...

... After a brief leave in Bangalore to work on astronomy (and holiday in Nepal), Dave will be continuing in management positions within the ATNF. ... We have also hosted an observing project visit from a contingent of ATNF and CTIP vacation scholars, who observed h Carina with the new 12-mm system (see article elsewhere in this issue), observed new HIPASS galaxies, and studied interference from microwave ovens. ... Currently we are testing this system with a single antenna. ...

... COBE Hotspots: The Oldest Structures Known . ... Above are two microwave images of the sky, looking north and south of our galaxy's equator, based on data from NASA's COBE satellite. After computer processing to remove contributions from nearby objects and the effects of the earth's motion, they show "spots". ... Our Earth is not at rest. ... The Sun orbits the center of the Milky Way Galaxy. The Milky Way Galaxy orbits in the Local Group. ... What's the closest galaxy to our Milky Way? ...

The Agile ICC computer (nimble) contains a high-accuracy GPS-synchronized timer card that emits pulses that trigger readout of the Agile camera when run in external synch mode. ... The recommended configuration for Agile has no GPS receiver (see 1 PPS Vs. The Built-In GPS Receiver below). ... Using external 1 PPS with on a GPS receiver mode is not fully supported, in that the timer card's firmware has been programmed to assume a GPS, but the tech support person claimed it would work. ...