This web site contains thousands of dynamic objects that must be updated as new data become available. Examples include postscript files, jpeg images, tables, HTML files, hydrographic profile data, and data distribution services. These objects are automatically generated or maintained in quasi-real-time by an extensible system of autonomous software. Consequently, maintaining this web site requires no regular manual intervention.
|Profiler Reliability Statistics|
for the period from Jan 01 00:01 GMT 2000 to Jul 20 20:32 GMT 2006.
|Group||Size||Profiles Executed||Profiles Expected||Reliability (%)|
The data are recovered from the floats via the Argos system. These floats spend 7 to 8 hours transmitting on the surface with one message transmitted every 46 to 54 seconds. This means that each float transmits from 470 to 530 messages for each profile. Most of these transmissions are lost because no satellite happens to be overhead. In fact, telemetry statistics below show that only 7 to 10 percent of these messages are transmitted when a satellite is overhead. Some statistics have wider appeal and we have collected several of them in the table below (updated daily). All of these statistics were computed on a per-profile basis.
|As of 21:04 GMT on Dec 17, 2011||Average Per-Profile Statistics for ARGOS Data Telemetry|
The profiles from these floats are published in quasi-real-time via the GTS system using TESAC/KKXX format. Each float is assigned a unique WMO identifer that can be found on our Present Status web page. The status of each profile with respect to GTS publication is also available on our GTS Status web page.
Quality control of profile data is managed automatically by a QC module that is integrated into the GTS publication software. Each profile must pass a number of quality control criteria in order to be published via GTS. If even a single observation in the profile violates any of the criteria then publication of the entire profile is inhibited. The following criteria are used to inhibit publication of rejected profiles.
This list is exhaustive in the sense that any profiles that do not violate these criteria will be published via GTS. In the absence of established GTS quality control criteria, the approach of caveat emptor has been assumed with respect to the hydrographic data.
. Questions concerning the information available here can be addressed to Mr. Temel Oguz, (email: email@example.com).
This web site was developed and is maintained by Dana Swift (email:firstname.lastname@example.org) of the University of Washington, Seattle, Washington.