Blog

Extended: Reduced satellite data and network outage for GINA to NOAA/NESDIS FCDAS

Published 2 days ago

We are having problems bringing up the WAN network link between the NESDIS FCDAS facility and UAF campus. Unfortunately, the outage and reduced availability of satellite data will continue until tomorrow (Feb. 23). We hope to have the problem fixed in the morning. 

Reduced satellite data and network outage for GINA to NOAA/NESDIS FCDAS

Published 4 days ago

GINA Near Real Time Satellite Users,

Starting at 11am Alaska Time on Wednesday February 22, 2017, the NOAA/NESDIS FCDAS facility feeding GINA hosted satellite data sets will undergo a scheduled power outage.  During this outage there will be a reduced number of satellite passes available for the NWS and partners.

The network link between UAF-GINA and FCDAS will also experience a short outage for maintenance during the power outage.

The power outage is anticipated to last no longer than 6 hours (ending at 5pm Alaska Time).

For updated information, follow GINA at http://twitter.com/uafgina <http://twitter.com/uafgina>

Questions and concerns regarding this outage should be forwarded to support@gina.alaska.edu <mailto:support@gina.alaska.edu>.

Thank you,

GINA Near Real Time Satellite Ops Team

Outage Notice: Web Mapping Services shut down.

Published 19 days ago

UAF-GINA will shut down public web services hosted on AlaskaMapped.org on March 1st, 2017. This will affect the GINA BDL, SDMI Ortho, GINA USGS Topographic Maps, Nautical Charts, and other data layers hosted publicly on AlaskaMapped.org. More details: http://alaskamapped.org/era.

We understand this is a very short time for the user community to be made aware of this change. We will immediately begin burning notice overlays into tile and WMS services to alert the user community. The transition period is limited, but we will do what we can to help users move on to the new service provider.

The Alaska Geospatial Council (AGC) has selected to transfer imagery services to a contract with a commercial provider to distribute the Alaska Statewide imagery (SDMI ortho) web services. The contractor, GeoNorth, is a long time partner and an active contributor to the state’s imagery program. GeoNorth has partnered with the UAF Alaska Satellite Facility and Terra Pixel, LLC to provide the AGC’s Geospatial Imagery Services for the next two years.

We will update this space here with contact and transition details once GeoNorth, ASF, Terra Pixel are officially awarded the contact and can provide points of contact and transition details.

We have enjoyed serving you, the mapping community in Alaska, for the past decade. In partnership with great users like you, we’ve grown our now extremely popular open standards web services from a handful of users and products to a service used by thousands every month, drawing a map to a user screen every second, around the clock. We’ve served you more than one hundred million maps, and this work became core to our mission. We’re proud to have worked with you over the past ten years, incorporating your feedback and data to make our services to you, the Alaska mapping community, better. It’s been fun. Thanks for helping us along the way.

More details: http://alaskamapped.org/era.

Sincerely, the GINA team

“Too Many Lights, Too Many Sources”  ...or...  “Who Put the Bogus in Bogoslof?”

Published 30 days ago

As described in this blog post, https://uafgina.tumblr.com/post/155398902124/volcanoes-aurora-and-clouds-oh-my, during hours of darkness, the Day Night Band detects visible light from a number of sources including reflected moonlight, the northern lights, city lights, ships, and even volcanoes.  

Satellite imagery, and not just the Day Night Band, has been used before to identify volcanoes.  For example, here’s a blog post from the University of Wisconsin showing imagery capturing the eruption of Pavlof Volcano in 2014. http://cimss.ssec.wisc.edu/goes/blog/archives/17179

So one might ask, is it possible to see a bright spot from Bogoslof Volcano in Day Night Band imagery?  It turns out this is unlikely.  Dave Schneider of the USGS’ Alaska Volcano Observatory mentions that the business end of Bogoslof Volcano, its “vent,” is under water and is thus not able to shine particularly brightly from the point of view of a weather satellite.  But wait, then what’s that bright spot in the Day Night Band imagery if it is not a volcano?  It turns out this is actually the town of Unalaska.  As shown in the map below, Bogoslof is about 35 miles northwest of Unalaska Island, and if you’re not careful, the lights of the small town of Unalaska could be mistaken for the lights of a volcano’s vent…and that is exactly the error in the previous blog post.  

Just this very morning Bogoslof got out of bed in a bad mood, perhaps upset about recent inaccuracies in this blog, and unleashed an explosive eruption sending a volcanic cloud up to 30,000 ft.  For the latest information on developments at Bogoslof, please consult the Alaska Volcano Observatory’s web site https://www.avo.alaska.edu/activity/Bogoslof.php

Also, a general description of Bogoslof is available at this link http://www.avo.alaska.edu/volcanoes/volcinfo.php?volcname=Bogoslof

Volcanoes, Aurora, and Clouds, Oh My!

Published about 1 month ago

The Day Night Band is a special channel on the Suomi National Polar Partnership (SNPP) weather satellite that can detect very faint sources of light even over Alaska during the darkest time of the year.  This image was taken at 3:21 am Alaska Standard Time on Friday, December 23.  

Note the prominent waves of aurora streaking across the state.  Sometimes the aurora can move faster than the Day Night Band can really keep up with, and in those situations the aurora can have a slightly smeared or striped appearance.  Zoom into the aurora shown in this image, and you can see the aurora’s jagged edge.  This phenomenon has been observed before and is described nicely in this blog post http://rammb.cira.colostate.edu/projects/npp/blog/index.php/uncategorized/aurora-australis-from-the-day-night-band/ 

Also note in the lower left corner of this image a faint smudge of light shining through a deck of clouds down at the end of the Alaska Peninsula (area highlighted in the yellow circle).   This is Bogoslof Volcano erupting, and is right next door to Palvolf Volcano whose previous eruptions have also been observed in the Day Night Band.   Similar activity at Bogoslof continued through the holidays and into this first week of January.  The latest information concerning Bogoslof is available at the Alaska Volcano Observatory’s website https://www.avo.alaska.edu/  

And lastly, even in the middle of an Alaskan night just a couple of days after the winter solstice, the Day Night Band detects clouds and their associated weather systems.  Note the clear skies over Kodiak Island and the western Gulf of Alaska, while much of the Bering Sea and Southeast Alaska have patchy cloud cover.  Day Night Band imagery, as well as other kinds of imagery from weather satellites, are available at GINA’s website http://feeder.gina.alaska.edu/

Single-Purpose Flour | Suomi NPP

Published 3 months ago Single-Purpose Flour | Suomi NPP:

Plume of Copper River glacial silt dust captured in a great series of Suomi NPP images. Nice write up of the science by Curtis Seaman of CIRA. HIs blogging comes highly recommended and often addresses Alaska topics.

-Tom