... Very low dust, aerosol content, and water vapor, as well as low scattered light from natural and artificial sources, minimizes blurring of images and provides "good seeing." ...
... The new filter will benefit the astronomical community in general by providing a diagnostic intermediate-band tool in the near-infrared (800-2500-nm), which is less affected by interstellar dust than the bluer StrУЖmgren filter system. ...
... obs-specs of ... before you push ... aka "do I need to tell you before each slew?" or "Can I track above 80 degrees?" ... answers to these types of questions) Closure (and reopening) conditions and policies (ie "Is it clear yet?") (rain/snow/ wind/dust ...
... 6 Deg F . Dust count < . NO threat of precipitation (remember that it takes nearly 20 minutes to close up). If open, close at: . 40 MPH for 15min; . ...
... cover flats (user control) - The mirror covers give secondary protection to the mirror to help keep dust off the mirror surface ... hours, we employ a pressurization fan (filtered) to help keep dust out of the enclosure (and also moderate the inside ...
... input end of the detector module (the tilt is necessary to prevent light reflected from the photodiode from bouncing off the v-groove block and returning to the photodiode, giving an incorrect reading; the orientation of the tilt reduces dust accumulation ...
... If there is some dust on the filters, carefully blow it off with the air spray canister found in the Darkroom; do not "tip" the canister down, as this may cause liquid to squirt out. ...