Hurricane Matthew moves into the Bahamas

October 5th, 2016
morphedmw_matthew_last48hrs_ending5oct_1000

Morphed Microwave Imagery showing the eye of Matthew from 1400 UTC 3 October through 1345 UTC 5 October (Click to enlarge)

The animation of Matthew, above, from morphed microwave imagery (from this site), shows the toll that interaction with the high terrain of Hispaniola and eastern Cuba has had on the storm (causing it to be downgraded from Category 4 to Category 3 intensity). The formerly distinct eye had eroded, although eye re-formation occurs at the end of the animation. Once again, a comparison of microwave vs infrared imagery revealed that the well-defined eye structure was much more apparent using microwave data. Strengthening/Re-organization of Matthew in the near term will be governed by Sea Surface Temperatures (that are warm) and wind shear (shown below, from this site, that is weak).

wg8shr_0900_5october2016

Diagnosed wind shear, 0900 UTC on 5 October 2016 (Click to enlarge)

Total Precipitable Water fields (from this site, using data from here), below, show abundant moisture surrounding Matthew at its present position. There is dry air over the eastern United States landmass, however.

Morphed Total Precipitable water from MIRS, 1300 UTC 4 October – 1200 UTC 5 October (Click to enlarge)

Morphed Total Precipitable water from MIRS, 1300 UTC 4 October – 1200 UTC 5 October (Click to enlarge)

During the morning and afternoon hours, the satellite presentation of Matthew began to slowly improve on GOES-13 Visible (0.63 µm) and Infrared Window (10.7 µm) imagery, below (MP4 | animated GIF), with well-defined convective bursts seen later in the day. Note: the noise seen on the 1645 UTC images was due to solar RFI.

GOES-13 0.63 µm Visible (left) and 10.7 µm Infrared Window (right) images [Click to play animation]

GOES-13 0.63 µm Visible (left) and 10.7 µm Infrared Window (right) images [Click to play animation]

GOES-14 Sounder Operations

January 31st, 2016

GOES-14 Sounder DPI of Total Precipitable Water (TPW) at 1800 UTC on 31 January 2016 [Click to enlarge]

GOES-14 Sounder DPI of Total Precipitable Water (TPW) at 1800 UTC on 31 January 2016 [click to enlarge]

GOES-14, over the Equator at ~105º W Longitude, has been activated in support of SRSO-R Operations in February 2016. One-minute imagery will commence on Monday 1 February. The GOES-14 Sounder has also been activated to fill in, temporarily, for the GOES-13 Sounder that has been inactive since November 2015. An animation of all 19 Sounder channels is available at this link; animations of Derived Product Images (DPI) of Total Precipitable Water from GOES-14, as shown above, are available here, with GOES-14 DPI of Lifted Index available here.

GOES-13 Sounder Anomalies

November 23rd, 2015

GOES-15 Visible (0.63 µm) images [click to play animation]

GOES-13 Sounder Band 5 Infrared (13.4 µm) images, 0847 and 0947 UTC on 20 November [click to enlarge]

On 20 November, at 0922 UTC, the GOES-13 Sounder experienced an anomaly (the GOES-13 Sounder had Filter Wheel anomalies in 2012 as well: Link; Link). GOES Engineers determined that the Filter Wheel had stopped moving (the filter wheel aligns the infrared detectors with the incoming data) so data were not scanned. The image above shows the 13.4 µm (a CO2 channel) image before and after the anomaly. All 18 infrared channels are affected; the visible channel (band 19) continues sending usable data. GOES Engineers continue to investigate the problem. GOES Sounder derived products (such as Total Precipitable Water) are affected, and are no longer being produced or disseminated (Link). From an email from SSD: (Link)

*Update #2: * **Effective immediately; all the GOES-13 (GOES-East)
sounding products are ceased to produce and stop distribution as we are
experiencing an anomaly with the sounder instrument. Engineers are
investigating the problem. We will inform you when we resume our normal
operations.

*Update #1: * GOES-13 (GOES-East) Sounder IR Data Outage

*Topic:* GOES-13 (GOES-East) Sounder IR Data Products Outage

*Date/Time**Issued:*November 20, 2015 1955Z*
*

*Product(s) or Data Impacted:*

GOES-13 (GOES-East) Sounder data
Blended Hydrometorological Products – Blended TPW
Microwave AWIPS Products – Blended TPW
Microwave McIDAS Products – Blended TPW
GOES Gridded Cloud Product
GOES VARiable data
AFEP/Ingestor – GOES
N-AWIPS Ingest
Single Field of View BUFR
Single Field of View SDPI for AWIPS
Single Field of View TPW
Sounding ASOS SCSP
Web Pages

*Date/Time of Initial Impact:*November 20, 2015 0922Z **

*Date/Time of Expected End:* TBD

*Length of Outage:* TBD

*Details/Specifics of Change:*GOES-13 (GOES-East) Sounder instrumentis experiencing an anomaly. Engineers are investigating the problem. GOES-13 Sounder IR data is not available. **Effective immediately all the GOES-13 (GOES-East) sounding products are ceased to produce and stop distribution as we are experiencing an anomaly with the sounder instrument. Engineers are investigating the problem. We will inform you when we will resume our normal operations.


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Update 19 January 2016
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GOES-14 is scheduled to broadcast 1-minute SRSO-R data starting 1 February. GOES-14 will be activated on 25 January, with a maneuver shortly thereafter. It is likely that GOES-14 Sounder data will be broadcast from 1-25 February (GOES-14 Sounder Timing will be adjusted to match GOES-13 Sounder Timing) when the GOES-14 Imager is broadcasting SRSO-R data.

GOES-15 Navigation Anomalies

May 4th, 2015
GOES-15 0.62 µm visible imagery, times as indicated on 3 May 2015 (click to enlarge)

GOES-15 0.62 µm visible imagery, times as indicated on 3 May 2015 (click to enlarge)

A GOES-15 (GOES-West) Star Tracker failed on 23 April 2015 at 2032 UTC. This leaves just one working Star Tracker; consequently image navigation has degraded. The image above shows three successive visible images centered near Crater Lake, OR, on 3 May 2015. The navigation shifts over time. An animation of 3.9 µm imagery, below, also from May 3rd (available here as an mp4), shows image navigation shifts throughout the day. A two-day animation of visible imagery centered on the Washington coast near Hoquiam (bottom, available here as an mp4) also shows the navigation anomalies that can be as much as 8 km in the infrared. Users who require precise animation in their GOES-15 imagery should be alert to this issue. NOAA/NESDIS, NASA and factory engineers are investigating possible fixes; GOES-15 status updates will appear here.

GOES-15 3.9 µm infrared imagery, 1400-2200 UTC on 3 May 2015 (Click to enlarge)

GOES-15 3.9 µm infrared imagery, 1400-2200 UTC on 3 May 2015 (click to enlarge)

GOES-15 0.62 µm infrared imagery, 1400-2200 UTC on 1 and 2 May 2015 (Click to enlarge)

GOES-15 0.62 µm infrared imagery, 1400-2200 UTC on 1 and 2 May 2015 (click to enlarge)