Date: Mon, 18 May 1998 05:33:24 -0600 (MDT) From: Tia Hoyes Subject: 3.5m obslog 980517 SUNDAY MAY 17, 1998 APACHE POINT OBSERVATORY OBSERVING LOG ACTUAL ASTRONOMER OBSERVER INSTRUMENT DATE START FINISH Turner Hoyes DIS 5/17 ----- ----- Hameed Hameed DIS 5/17 ----- ----- Lutz Lutz DIS 5/17 ----- ----- INST SCHEDULED OBS WEATH EQUIP DAY NOTUSED I/RS/DN START FINISH D B D B D B USE D B PU01/S 21:32 22:12 0 0 0.7 0 0 0 0 0 0 NM03/R 22:12 01:10 0 0 3.0 0 0 0 0 0 0 WS02/R 01:10 04:27 0 0 0 3.3 0 0 0 0 0 (note: times listed include instrument change time) ACTIVITY LOG The telescope was not open tonight due to overcast skies and high dust counts. The dust counts were all over the place tonight. It was never stable. I tried the flashlight test to check the dust also, and it seemed very thick all evening. Forecast:(4:30am) TODAY...PARTLY CLOUDY THIS MORNING...MOSTLY CLOUDY IN THE AFTERNOON WITH WIDELY SCATTERED THUNDERSTORMS. LIGHT EAST WINDS THIS MORNING AND SOUTHWEST 10 TO 20 MPH AND GUSTY IN THE AFTERNOON. .TONIGHT AND TUESDAY...PARTLY CLOUDY WITH WIDELY SCATTERED LATE AFTERNOON AND EARLY EVENING THUNDERSTORMS. (* means a trouble report has been issued or appended to) FOCUS LOG MAY 17, 1998 Best Telescope Wind Seeing Time Inst Focus Az El Temp# Dir MPH filter FWHM " -------NO FOCUS DATA------ # The first temp is air, the second is truss, both in degrees C. WEATHER MAY 17, 1998 Wind Time Temp F Dewp. MPH. Dir. DUST Sky Precip. 16:01 66 21 7 213 (SSW) 576 overcast none 17:01 65 21 5 195 (SSW) 712 overcast none 18:01 62 21 6 193 (SSW) 663 overcast none 19:01 61 20 5 183 (S) 806 overcast none 20:01 60 20 4 185 (S) 1614 overcast none 21:01 59 21 4 239 (WSW) 2489 overcast none 22:01 59 21 4 182 (S) 3204 overcast none 23:01 59 20 27 166 (SSE) 2101 mostly cloudy none 00:01 54 30 20 141 (SE) 3994 partly cloudy none 01:01 54 32 25 138 (SE) 2089 partly cloudy none 02:01 55 32 23 149 (SSE) 2945 partly cloudy none 03:01 55 32 21 146 (SE) 3543 partly cloudy none 04:01 54 32 19 160 (SSE) 3159 partly cloudy none 05:01 55 32 16 167 (SSE) 4133 clearing none note: the wind was coming from the azimuth listed. The convention used is north=0 degrees, east=90 degrees. The dust count is particles >1 micron per 0.1 cu. ft. TELESCOPE STATUS Primary, secondary, and tertiary mirrors in place and collimated. Primary support system operational. Mirror ventilation system in place. Telescope drives operational. Current Remark version: 2.39 Current guide software version:GIm Ctrlv3.0b11. -Tia