Archive for June, 2009

GOES-O (GOES-14) launched!

Saturday, June 27th, 2009
GOES-12 visible images

GOES-12 visible images

The GOES-O satellite was launched at 22:51 UTC on 27 June 2009 from Cape Canaveral, Florida (station identifier XMR). GOES-12 visible images (above) showed a portion of the rocket plume on the 23:02 UTC image (some ground-based photos of the launch are available here).

This satellite will become GOES-14 after the hand-off from NASA to NOAA, and will then undergo a Post Launch Test (PLT) during the July-December 2009 period — the first GOES-14 visible images should be made available on 27 July, with the first InfraRed images available in mid-August. CIMSS has calculated the weighting functions for the GOES-14 imager and sounder channels as well as the spectral response functions and Planck function constants for GOES-O…and CIMSS will also contribute to the NOAA Science Test portion of the PLT in November/December 2009.

Convective initiation along an outflow boundary

Thursday, June 25th, 2009
GOES-12 visible images

GOES-12 visible images

GOES-12 visible images (above) showed a nice example of convective initiation along an outflow boundary from thunderstorms a few hours earlier across northeastern Iowa on 25 June 2009. This new convection that developed along the outflow boundary produced hail of 1.5 inch in diameter and damaging winds in extreme northern Illinois (just south of the Wisconsin border) during the 20:42 -21:02 UTC period.

A comparison of AWIPS images of the MODIS visible channel and a Red/Green/Blue (RGB) composite using MODIS bands 01/07/31 (below) showed the value of the false-color RGB imagery to help highlight the darker green patch of wet ground produced by heavy rainfall from the initial area of thunderstorms. Ice crystal clouds appear as varying shades of pink in the RGB image, which also helps to identify growing areas of cumulus clouds that have glaciated.

The next generation of AWIPS (AWIPS2) should offer NWS forecasters the ability to create and display this type of 24-bit RGB imagery (which is not possible using the 8-bit graphics capability of the current AWIPS system).

MODIS visible + false-color RGB image

MODIS visible + false-color RGB image