Gilgen, H. et al: Technical Plan for BSRN Data Management, W orld Radiation Monitoring Centre (WRMC)
26
Technical Report 1, Version 2.1. World Climate Research Programme WMO/TD-No. 443. 1995
74
9.3.2.2 Downwelling infrared radiation
The downwelling infrared signal should be compared against the effective infrared irradiance derived
from the air temperature at the same location:
eff
L = F T
4
eff
where L effective radiation signal in Wm
=
-2
F = Stefan-Boltzmann constant
a
T air temperature (K)
=
With the exceptions of isothermal fog and strong inversions over cold surfaces, the effective irradiance
should be greater than that measured by the pyrgeometer. In fog, the two values should be nearly
equal.
Including a surface emissivity term of 0.75, provides a reasonable lower bound against which the instrument
radiation should be consistently greater.
In both cases these values should be used conservatively for flagging suspect data and determining
whether problems exist with the instrument components. Data should only be flagged if, upon examination,
an instrument defect is discovered.
9.4 Data Submission to the BSRN Archive
Data, once quality assured by the site scientist, are to be submitted to the BSRN archive at the Swiss
Federal Institute of Technology (ETH) in Zurich, Switzerland. Full documentation on the BSRN database
is found in: Technical Plan for BSRN Data Management, World Radiation Monitoring Centre (WRMC)
Technical Report 1. Version 2.1 . A brief summary of this and other information concerning access
26
to the database can be found on the internet at bsrn.ethz.ch/wrm c/database_internal.htm l. Annex Q
provides information on the linkages between the data acquisition at the BSRN station and the WRMC,
ETH.
Data submission requires that the format set out in the above manual be adhered to strictly. To support
this effort, WRMC has developed a program, F_CHECK.C that performs checks on line length, illegal
characters and line format. This program can be obtained directly from the archive and should be requested
when the necessary access permissions are established (data manager email:
bsrnadm@geo.umnw.ethz.ch).
The procedure for submitting data to the archive begins with obtaining an account on a secure FTP
server for which only the station scientist (or named designates) has access. This is accomplished
by informing the database administrator of the intent to submit data and providing the FTP addresses
of one or two machines from which the data will be submitted. In response the archive will set up a
secure directory on their server and provide the requestor account information and a password. These
will only function from the machines with the submitted FTP addresses. Following logon, the system
will place the user directly into the directory in which to submit the data files for the station.
Upon receipt of the data files (monthly blocks in sequential order are preferred) at the archive, the
data are automatically moved from the input directory into a second directory from where they are
automatically checked for formatting problems etc. If errors in the data are found, an error log is produced
and returned to an error directory associated with the station name. This error log can then be downloaded
and the incorrectly formatted data files deleted from the BSRN server. Once corrected the data are
resubmitted. It is suggested that the first block of data submitted to the archive be only one month
because of the usual problems associated with correctly formatting the data files.
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentarios a estos manuales