UV

G. Seckmeyer (IMuK, U. Hannover) — IMuK UV spectroradiometer, approved as an NDACC traveling standard UV spectroradiometer. The instrument is based on a Bentham DTM300 scanning double monochromator spectroradiometer (0.5 nm bandwidth) and uses three detectors (PMT, silicon diode, PbS diode) for covering a spectral range of 280–2500 nm. The system affords measurements of spectral UV irradiance and spectral radiance distributions under all-weather conditions. The entrance optics are aligned by an all-weather two-axis positioning unit, which can also be used under Antarctic weather conditions. The system participated in the 2003 North American interagency intercomparison of ultraviolet spectroradiometers, which was organized at the Table Mountain Observatory close to Boulder, Colorado. This instrument currently has data archived for Izaña (Tenerife), Spain (see latter entry).

G. Seckmeyer (U. Hannover) — Intercomparison campaign data for July 2005.  See Hanover, Germany entry.

S. Stierle (NOAA/ESRL) and G. Bernhard (Biospherical Instr.) — Spectral distribution of UV irradiance (280–600 nm) with an SUV-100 double monochromator. Measurements initiated in February 1988 and archived since 1990. Calibrated fortnightly.

S. Stierle (NOAA/ESRL) and G. Bernhard (Biospherical Instruments) — Measurements of the spectral distribution of irradiance from 285-600 nm with an SUV-100 double monochromator. Measurements were initiated in March 1988. The SUV-100 is calibrated fortnightly during the measurement season.

S. Stierle (NOAA/ESRL) and G. Bernhard (Biospherical Instr.) — Measurements of spectral distribution of UV irradiance from 285–600 nm in 0.2 nm steps with an SUV-100 double monochromator. Measurements were initiated in May 1988 and archived since 1990. Calibrated fortnightly during the measurement season.

G. Bernhard and C. Booth (Biospherical Instr.) — Measurements of UV spectroradiometer irradiance, with an SUV-100 and GUV-511, initiated in November 1988. Operations ceased at the end of 2008 due to funding termination.

A. Geddes, J. B. Liley, M. Kotkamp (NIWA) — Measurements of the spectral distribution of UV irradiance (285–450 nm) using a double monochromator since December 1989 and archived since 1991. In November 1993, the original UVL spectrometer (JYDH10), which allowed observations only in fair-weather conditions, was replaced by the UVM spectrometer (Bentham DM300). In September 1998, the integrating sphere on this instrument was replaced by a PTFE diffuser to allow all-weather observations, including during rain. There have been occasional periods of spectral sky radiance and spectral actinic flux observations. The latter also may be derived from spectral irradiance measurements. Direct beam spectral UV irradiance measurements have been made since 2011 (with the UV2 spectrometer). A variety of filter radiometers also have been used since 1992. Information regarding specific instruments and deployments are available from the PIs. Data through 2013 archived under former PI, McKenzie.

A. Geddes, J. B. Liley, M. Kotkamp (NIWA), S. Rhodes (BoM) — Measurements of spectral UV irradiance (285 – 450 nm) since 2005 using a Bentham (UV6 and UV7) spectrometer. Data prior to 2014 archived under former PI, McKenzie.  Operations ceased in 2022.

F. Minvielle, F. Auriol, and C. Brogniez (LOA) — Spectral irradiance measurements (290–400 nm) with a Bentham DTMc 300 spectroradiometer that was installed at the end of 2008.  Participated in an intercomparison with the QASUME standard instrument in 2013.

A. Geddes (NIWA), S. Stierle (NOAA/ESRL), B. Liley, M. Kotkamp (NIWA) — Global and scattered UV spectral irradiances (285 – 450 nm) since 1995. Data to 2014 archived under previous PI (McKenzie).