... The WFPC2 CCDs have a small b ut significant charge transfer efficiency (CTE) problem which causes some signal to be lost when charge is transferred down the chip during readout. This has the effect of making objects at higher row numbers (more charge transfers) appear fainter than they would if they were at low row numbers. The effect depends on the temperature of the CCDs. ... It is also possible that proportional losses for fainter stars, at least with no background, may be larger. ...

... 313 = 0.108 AOT= 0.036 - 0.749 12 14 (Path Radiance): 3 MODIS/Terra (=466 ); 28.07.2001, 05:50 GTM 15 : 31 MODIS/Te rra (=11 ); 28.07.2001, 05:50 GTM 16 ; 17 MODIS/Terra: , 2001 . 18 ' ' : MODIS/ Terra, , 200 1 . ... 65 MODIS /TE RRA 1 284 286 288 290 292 294 296 284 286 288 290 292 294 296 , , . ... 291 .2 = 2 .7 0 MODIS /TERRA 2 284 286 288 290 292 294 296 298 284 286 288 290 292 294 296 298 , , 26 , ETM+/Lansat-7 MODIS/Terra ! ...

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... The current MOS procedure envisages a less complicated correction mechanism than for the PN. ... The CTI correction applies a scalar correction to the event list set, on an event by event basis, in order to correct for loss of charge which has occurred in reading out the CCD array. ... We expect to correct for a fixed amount of charge loss, and a fractional amount of charge loss, which depends on the number of row and column transfers completed. ... http://xmm.vilspa.esa.es/ xmmdoc/MOS/mos_cti.html ...

The success of any ALMA phase-calibration strategy, which incorporates phase transfer, depends on a good understanding of how the atmospheric path delay changes with frequency (e.g. Holdaway Pardo 2001). ... We find the wet dispersive path delay becomes a significant fraction ( 5 per cent) of the non-dispersive delay for the high-frequency ALMA bands ( 160 GHz, Bands 5 to 10). ... The full text of the memo is available here . ... Dispersive path delay . 2009 Emily Curtis ...

... 1 available ; Nd:YAG based laser transmitter; 24 W average power (100 MW peak power ) at 532 nm; Additional output at 1064 nm fundamental (currently 355 nm is not available ); 6 ns pulse width; 40 Hz operation; 80 cm diameter Cassegrain telescope receiver; Fully pointable (but generally aircraft restricted to within 45 o of zenith; Electronic gated photomultiplier tube detection with low-altitude chopper; Data collection is ... F. Airglow Mirror Systems: . ...

... However, in some situations it is advantageous to use an image-preserving fiber optic bundle in place of conventional imaging optics. ... The Coherent Fiber Bundle . ... In order to successfully couple light from an imaging fiber bundle to the CCD, the CCD and fiber bundle must be in very close proximity. ... Besides the transmission losses through a large piece of glass, fiber-optic bundles have a transmission loss due to changes in the fiber diameter as light traverses the bundle. ...