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SAR wave mode (L2P) data

GlobWave offers free access to 1 geophysical quality and 1 real-time SAR wave mode data streams from 1 satellite stretching back as far as 2002 with Envisat in an homogenenous and consistent format and content. ERS-1 and ERS-2 data will be also available in a close future too.

SAR-data

A Synthetic Aperture Radar (SAR), operating at C-band like on Envisat, ERS-1 or ERS-2, offers the unique ability to provide continuous global directional information on wave field for various uses such as input to numerical weather prediction models (NWP) as well as ocean wave climate tools. Wave mode products correspond to small measurements called wave cells (or imagettes) which are approximately 5 km along-track by (up to) 10 km in across-track., acquired at 100 km (or 200 km for ERS) intervals.

 

 

SAR products summary

GlobWave SAR come in two different product lines, for which data from several SAR missions are or will provided :

  • real-time products, available for still ongoing missions within a few hours after acquisition (usually about 4 hours) for operational applications such as wave forecasting
  • geophysical products, available usually a few weeks or months (or years in case of reprocessing) after acquisition. These are the best quality data and should be used when real-time data are not necessary. The globwave archive for these products is updated every 6 months.

Geophysical products

Product Id

Source L2 product

Mission

Coverage

GW_L2P_SAR_ERS1_GDR (soon)

SAR_WVW_2P (ESA/Ifremer)

ERS-1

1991 - 1996

GW_L2P_SAR_ERS2_GDR(soon)

SAR_WVW_2P (ESA/Ifremer)

ERS-2

1995 - 2003

GW_L2P_SAR_ENVI_GDR

ASA_WVW_2P (ESA/Ifremer)

Envisat

10 Dec 2002 - 8 April 2012

Real-time products

Product Id

Source L2 product

Mission

Coverage

GW_L2P_SAR_ENVI_NRT

ASA_WVW_2P (ESA)

Envisat

03 Nov 2010 - 8 April 2012

How I do I get access to the data? The data is hosted on an ftp site. Username and password details can be obtained by e-mailing the CERSAT Help Desk at This email address is being protected from spambots. You need JavaScript enabled to view it. with the subject: GlobWave Data Access. We recommend that you consult sections 3 and 4.4.6 of the Product User Guide regarding essential information and known issues respectively. If you already have a username and password then you can browse the data on the ftp site by clicking here.