YALO Nightly Observing Report for 1999 Sep 13 Observer: Juan Espinoza Observed all night from 2300 to 0945 UTC. Conditions were Mixed most of the night. No equipment or software problems were encountered. Seeing and Weather: Beg: Seeing 1.8 arcsec, Cirrus, Winds Calm, turning to clear Mid: Seeing 2.0 arcsec, Clear, Winds Light & Variable End: Seeing 2.2 arcsec, Cirrus, Winds Light & Variable, becoming cirrus heavy Observing Summary: Program accomplished. ( lots of data...!!! ) Portugal program observed with few strings of cirrus. Differential magnitude of Aql in R band: 2.4 Fisrt and middle of the night was pretty much clear until 0700UT ( around 0130LST ). Note: In order to fit all of tonight's data in one tape, I *moved* all 60 calibration frames of IR into a separate directory named `IRflats_990913' We will need to make some adjustments in taping all the daily data now that it is becoming a little too overwhealming for just one tape to hold. (**i have not deleted the calibration frames**) ------------------------------ Submitted by Juan Espinoza on 1999 Sep 14 [5:43:18]