ESRL Radiosonde Database
Restrictions / Disclaimer
The radiosonde data archive is composed of two distinct
components: The Archive Dataset (available on CD-ROM and DVD) and the Real-time Dataset (available online).
Archive Data on CD-ROM and DVD
These datasets were produced by ESRL Global Systems Division (formerly Forecast Systems Laboratory (FSL)
. NCDC provided older data to us in a standard
format (TD6201 series). More recent data was obtained from the NCDC/IGRA
archive. We take this data, combine it with all available
North American Global Telecommunications Service (GTS) observations, collected
at ESRL These data undergo extensive gross error and hydrostatic
consistancy checks before being incorporated into the BUFR format,
compressed data archive.
The North American Archive (1946-1996) on 4 CDs and Global Archive (1994-2010)
on DVD, however it is no longer available thru NCDC's online store. Please
contact Mark Govett, firstname.lastname@example.org
if you with to order these datasets from NOAA's Earth System Research Laboratory (ESRL).
The real-time archive is comprised of all global GTS
observations. The same decoding and extensive QC analysis are run on
each observations and is consisent with data on the CDROM/DVD archive. Data
is stored in the same randomly accessible compressed data format.
Users can access this data from ESRL's
web site.. In 2007, we completed
a merge of GTS global data available thru NCDC's IGRA project, with the
observations we have collected at ESRL/GSD. The merged dataset contains significantly more observations than were available from either dataset. Two DVDs containing all global observations from 1994-2010 is available on DVD. We expect to produce annual updates. An inventory of the data available at this site and on the DVD is online.
Quality Control Procedures
Most questions regarding the processing of the data can be answered by
reading the official NOAA Technical Memorandum:
"A Hydrostatically Consistent North American Radiosonde Data Base At The Forecast
Systems Laboratory, 1946-Present" . This PDF document is 67MB so it may
take a few minutes to download. Please refer to this document for answers to
any technical questions that are not answered elsewhere on this website.
DATABASE ACCESS SOFTWARE
Data is stored in binary for efficient storage and flexible access. A database
access routine was been written to speed your access to the observations
needed. The user can select for output to the screen
or file: a single station or multiple stations for a defined time
period, or all stations within a specified geographic region in either
synoptic or station sort. Data can be output in 4 currently supported
data formats: two ASCII ESRL formats,
a GTS format, and a NetCDF format.
Reports consist of data taken at mandatory, significant,
and WMO regional and significant (PPBB) wind levels
General information about radiosonde data is available from the
Federal Meteorological Handbook.
CD-ROM and DVD Database Access Software (Version 4)
Please note: This is recent, research-quality
data that has not been subjected to production quality control procedures.
Nor has the data acquisition system been designed to be continuously-available
for operational use.
We are making this available for research use, but
be warned that the Earth System Research Laboratory makes no guarantees as
the the accuracy, timeliness or availability of this service or data provided
by it. We cannot be held responsible for any circumstances resulting
from its use, unavailability, or possible inaccuracy. We reserve the right
to suspend or discontinue this service or portions thereof at any time.
We also reserve the right to deny access to any
individual or organization that we determine is abusing this service.
Examples of abuse include automated transfers resulting in excessive data
requests (because it hinders others from accessing the service) and attempting
to gain access to documents and host machines not intended for public use.
National Oceanic and Atmospheric Administration (NOAA)
Earth System Research Laboratory (ESRL)
Global Systems Division (GSD)
Mark Govett, email@example.com