Friday, September 22, 2017

Sunspot Observation for NearSys Station, 22 September 2017

Only a single sunspot was visible as the sun set behind a cloud bank. The penumbra had a calculated diameter of 11,107 miles and the umbra a diameter of 4,859 miles. Compare this to Earth's diameter of 7,920 miles.
The original image. The sunspot is located near the edge of the 9:00 position.

The image after thresholding.

Background Neutron Radiation for NearSys Station, 22 September 2017

In 142.5 hours of observation, give neutrons were detected. That's a background level of 1.75 microrem of thermal neutron radiation.


Saturday, September 16, 2017

Background Neutron Radiation for NearSys Station, 15 September 2017

After 118.5 hours of monitoring, three neutrons were detected. This is a background of 1.2 microrems per hour.


Sky and Ground Thermal Observation for NearSys Station, 16 September 2017

This morning at 8:00 AM MDT the skies were clear of clouds except for very minor streak of cirrus. The ground temperature was 17 *F And the sky temperature was -43 * F. At a difference of 60 degrees and assuming a 5.4 degree dry lapse rate, the altitude the sky temperature was measured is 11,100 feet.

Thermal image of the sky overhead NearSys Station.

This afternoon at 8:00 PM MDT, the sky was clouded over with nearly 100% altostratus (some high level cirrus was visible through gaps). The ground temperature was 34 *F And the sky temperature was -21 *F. Assuming a lapse rate of 5.4 *F, the altitude at which the sky's temperature was measured is 10,200 feet.

Thermal image over NearSys Station this evening. The sky was nearly 100% overcast with altostratus.

RGB image of the sky overhead of NearSys Station this evening.

All Sky Photometer Data for NearSys Station, 16 September 2017

Photometer data were collected beginning at 6:00 AM MDT. Note that there are no spikes in the orange band before and after local noon. This time the photometer was rotated 90 degrees relative to the other days data were collected. I need to see if the data maintains this result. If so, then possibly glare from neighboring LEDs are effecting the orange LED.

Visibility for NearSys Station, 16 September 2017

Based on UAV images taken at 400 feet AGL, the visibility at NearSys Station is at least 50 miles.

Looking east. The Lucy Lee ditch, which supplies irrigation to NearSys Station, is visible as a ribbon winding its way across the image. The Boise Mountains are barely visible on the horizon on the left side.

Looking north.

Looking south towards the Snake River and the Owyhee Mountains.

Looking West towards Homedale and the Snake River.

UAVSonde Data for NearSys Station, 16 September 2017

UAVSonde data were collected at 8:00 AM MDT. Here are the data.

Altitude: 2,296 feet
Temperature: 57 *F
Relative Humidity: NA
Pressure: 938.5 mb

Altitude: 2,673 feet
Temperature: 68 *F
Relative Humidity: 25%
Pressure: 924.3 mb