Title: Discoverer Spectroradiometer Measurements

Contact:

   James E. Johnson
   OCRD
   NOAA/Pacific Marine Environmental Laboratory
   7600 Sand Point Way NE
   Seattle, WA, USA, 98115
   Telephone: (206) 526-6355
   Facsimile: (206) 526-6744
   E-Mail Address: johnson@pmel.noaa.gov


Data Set Description:

A Licor 1800 Spectroradiometer with an 8 nm bandwidth
was used to measure spectrally resolved solar irradiance
between 300 and 850 nm from Day of Year (DOY) 321 to DOY 345.
The Spectroradiometer was placed on the top of a sampling
van near the stern of the DISCOVERER  with a fairly clean
view of the sky,  only rarely was the spectroradiometer
shaded by a crane or the stern mast of the ship

Every 15 minutes during daylight hours, five spectral scans
were made and averaged into one spectrum containing data
at 2 nm intervals that was stored in the data record.

The Licor Spectroradiometer was calibrated during the
Hobart while in port (Nov. 15-19, 95) using a Licor calibrator that
contained a calibrated lamp and highly controlled power
source.

The data contains one time series data set for each wavelength from
300 to 598 nm and a parallel time series data set for each
wavelength from 600 to 850 nm.

The first column in each file is the Date (YYYY/MM/DD),
followed by Time (HH:MM:SS), decimal Day of Year, (all UTC),
then the measurements at each wavelength.

The first row contains the column headers w300, w302......
which are the wavelengths in nm. The spectrally resolved downward
irradiance is in units of watts/meter^2/nm.

Publications that make general use of these  data are requested to acknowledge
James Johnson for providing the data.  Co-authorship is requested
for significant use of these data in a publication.

Format: comma-delimited ASCII file as described above.

File Name Conventions:
  ts_spec1.dat (wavelengths 300 - 598 nm)
  ts_spec2.dat (wavelengths 600 - 850 nm)

References: None.