\header ENTRY_TIME = 2004 JUN 18 22:47:28 SYSTEM_NAME = NAVCAM AUTHOR = RAY L. NEWBURN, JR. INSTITUTION = JPL (CHIPTON-ROSS) START_TIME = 2004 JAN 01 00:18:00 STOP_TIME = NULL TARGET = OTHER DAY = NULL \text The first set of January 1 images, 1059 through 1066, were taken at a scan mirror angle of 24.49 degrees. All were windowed images using three 291 x 291 pixels with a scan mirror angle of 24.49 degrees. The first four were 15 second exposures, the second four, 10 second exposures. \header ENTRY_TIME = 2004 JUN 18 22:53:16 SYSTEM_NAME = NAVCAM AUTHOR = RAY L. NEWBURN, JR. INSTITUTION = JPL (CHIPTON-ROSS) START_TIME = 2004 JAN 01 05:18:00 STOP_TIME = NULL TARGET = OTHER DAY = NULL \text The second set of January 1 images, 1067 through 1074, were also taken at a scan mirror angle of 24.49 degrees. All were windowed images using three 291 x 291 pixels with a scan mirror angle of 24.49 degrees. The first four were 15 second exposures, the second four, 10 second exposures. \header ENTRY_TIME = 2004 JUN 18 22:56:34 SYSTEM_NAME = NAVCAM AUTHOR = RAY L. NEWBURN, JR. INSTITUTION = JPL (CHIPTON-ROSS) START_TIME = 2004 JAN 01 08:18:00 STOP_TIME = NULL TARGET = OTHER DAY = NULL \text The third set of January 1 images, 1075 through 1082, once again were taken at a scan mirror angle of 24.49 degrees. All were windowed images using three 291 x 291 pixels with a scan mirror angle of 24.49 degrees. The first four were 15 second exposures, the second four, 10 second exposures. \header ENTRY_TIME = 2004 JUN 18 22:59:19 SYSTEM_NAME = NAVCAM AUTHOR = RAY L. NEWBURN, JR. INSTITUTION = JPL (CHIPTON-ROSS) START_TIME = 2004 JAN 01 12:18:00 STOP_TIME = NULL TARGET = OTHER DAY = NULL \text The fourth set of January 1 images, 1083 through 1090, once again were taken at a scan mirror angle of 24.49 degrees. All were windowed images using three 291 x 291 pixels with a scan mirror angle of 24.49 degrees. The first four were 15 second exposures, the second four, 10 second exposures. \header ENTRY_TIME = 2004 JUN 18 23:15:46 SYSTEM_NAME = NAVCAM AUTHOR = RAY L. NEWBURN, JR. INSTITUTION = JPL (CHIPTON-ROSS) START_TIME = 2004 JAN 01 21:18:44 STOP_TIME = NULL TARGET = OTHER DAY = NULL \text The sixth set of January 1 images, 1099 through 1106, were taken at a scan mirror angle of 24.49 degrees. All were windowed images using three 291 x 291 pixel windows. Image 1099 was missing. Image 1100 had two windows, but only the image containing the comet was complete. Images through 1102 were 15 second exposures, the last four were 10 second exposures. \header ENTRY_TIME = 2004 JUN 18 23:23:42 SYSTEM_NAME = NAVCAM AUTHOR = RAY L. NEWBURN, JR. INSTITUTION = JPL (CHIPTON-ROSS) START_TIME = 2004 JAN 02 05:18:44 STOP_TIME = NULL TARGET = OTHER DAY = NULL \text Images 1107 through 1115 , one complete set, are missing. The final set of optical navigation images, numbered 1116 through 1122, were acquired using three 291 x 291 pixel windows and a scan mirror angle of 24.49 degrees. The first three utilized 15 second exposures and the final four 10 second exposures. \header ENTRY_TIME = 2004 JUN 18 23:55:05 SYSTEM_NAME = NAVCAM AUTHOR = RAY L. NEWBURN, JR. INSTITUTION = JPL (CHIPTON-ROSS) START_TIME = 2004 JAN 02 18:54:28 STOP_TIME = NULL TARGET = OTHER DAY = NULL \text Images 2005 through 2115 are the 81P/Wild 2 encounter set. There are 72 complete images in this set, the missing numbers having been used only to establish the autotracking on the nucleus. There was sufficient memory only for the 72 images. It is the nature of the shutter that alternate exposures are 1.65 milliseconds shorter than the set exposure time. The even numbered images are the shorter ones taken during the encounter. We were quite limited in the number of changes that could be made in the exposure time, so most were taken at settings of either 100 milliseconds (actually 98.35 milliseconds) or 10 milliseconds. Many of the longer exposures were saturated, but these serve very well to bring out the many jets of gas and dust ejected by the comet. Scan mirror angles ranged from 1.37 degrees for image 2005 through 176.05 degrees for image 2115. The images with the mirror at more than 170 degrees all exhibit a great deal of scattered light, probably from the sample return capsule. There are lesser amounts of scattered light on images back to about 160 degrees. There is a problem with images taken near 0 degrees as well, from light scattered from the launch vehicle adaptor ring which actually occludes a bit of the periscope. \header ENTRY_TIME = 2004 JUN 19 00:21:48 SYSTEM_NAME = NAVCAM AUTHOR = RAY L. NEWBURN, JR. INSTITUTION = JPL (CHIPTON-ROSS) START_TIME = 2004 JAN 13 02:24:28 STOP_TIME = NULL TARGET = OTHER DAY = NULL \text Images 2116 through 2130 were taken to attempt to calibrate all of the images, to check the post-encounter state of the periscope, and to check the calibration lamp, which appeared to have failed pre-encounter. Images 2116 and 2129 were bias frames. Images 2117 through 2125 constituted the very limited calibration set. Images 2126 through 2128 were for the periscope check, and 2130 was the calibration lamp check. The calibration images all were taken at scan mirror angles near 24 degrees, four with 1 second exposures, four with 5 second exposures and one with a 15 second exposure. All were uncompressed full frame images. The periscope checks were done at an angle of -0.10 degrees and were full of scattered light. This was expected to some extent, but the very mottled appearance of the images indicated that one or both mirrors of the periscope were thoroughly sandblasted by the passage through the Wild 2 coma. The check of the calibration lamp unfortunately was done with a 1 second exposure rather than 20 milliseconds. It was obviously working just fine, since every pixel in the frame was saturated.