Schematic diagram of the GSR.
Schematic diagram of the GSR calibration and scanner system. The GSR scanhead periodically moves out of the framework for zenith viewing on a trolley system, and shares time observing the atmosphere and the two temperature-controlled blackbody reference targets.

GSR in process of assembly
GSR in process of assembly on March 7, 2004 in Barrow, AK. This photo shows the GSR framework with the external calibration targets and the scanhead with the radiometers installed are shown.

GSR radiometers mounted
GSR radiometers mounted on the scanning drum scanhead.

GSR operating in Barrow, AK
GSR operating in Barrow, AK, during the WVIOP04, on March-April 2004.

Calibration, dwell, and continuous scanning sequence diagram
Calibration, dwell, and continuous scanning sequence of the GSR.

GSR inside shelter calibrating.

GSR scanning.

GSR scanning opposite horizon
GSR in motion samples (mpg) from Barrow, Alaska, on March 10 2004

Time series of Tb between 50 and 60 GHz
Time series of Tb between 50 and 60 GHz.

Time Series of Tb for channels around the  183.31 GHz
Time Series of Tb for channels around the 183.31 GHz water vapor line.

Time series of Tb near the 380.2 GHz water vapor line
Time series of Tb near the 380.2 GHz water vapor line.

50 GHz timeseries.
50 GHz timeseries.

89 GHz timeseries
89 GHz timeseries.

183 GHz timeseries
183 GHz timeseries.

340 GHz timeseries
340 GHz timeseries.

380 GHz timeseries
380 GHz timeseries.

Cloud Radar, Micropulse Lidar and MWR Composite
Composite image of Cloud Radar, Micropulse Lidar and MWR observations for the first six days of the IOP. Clear sky, low cloud, mid-level clouds, mixed-phased clouds were observed.

GSR brightness temperatures
GSR brightness temperatures (Tbs) at 53.8 GHz, 54.9 GHz, 183.3±0.5 GHz, 183.3±3 GHz and 380.2 GHz compared with simulated Tbs from the National Weather Service sondes in Barrow (green dots), and Vaisala sondes launched at ARM Duplex (black dots) and at Great White (cyan dots).

Precipitable Water Vapor
Precipitable Water Vapor (PWV) retrieval in Barrow, AK, from the dual channel MWR with both ARM calibration (Liljegren 2000) and ETL calibration applied (Han and Westwater 2000), GPS and Radiosondes from the National Weather Service sondes in Barrow (pink dots), and Vaisala sondes launched at ARM Duplex (red dots) and at Great White (cyan dots). infrared radiance spectrum of the sky
High quality images of the infrared radiance spectrum of the sky were obtained throughout the experiment by the ICI. Mixed cloud features with temperatures in the -20 °C range, with the much colder clear sky portions of -50 to -60 °C can be seen from the figure.

Comparisons of Radiosondes
Comparisons of Radiosondes, including dual-sonde launch, on March 15 at 2300 UTC, Barrow, Alaska when four systems were launched at the same time.

Dual-sonde launch


snow white and Vaisala RS90 sondes