Archive for November 10th, 2009

58 Kilometers

Tuesday, November 10th, 2009

Scarlet has found a nice tail current of about 15 cm/sec.  Her own speed was clocked at 17 cm/sec relative to the water.  Nearly 9 km made good over the last 8 hour segment.  Total distance to the EEZ is down to 58 km. We moved the waypoint north again.  We want to ride the outer edge of that loop around the green circle. 


Zooming out to the full region, we are trying to find a safe place to put Scarlet once we get inside the Spanish EEZ.  The currents in the green circle above are no longer an eddy.  The image below shows the eddy that once was there has evolved into a jet headed straight to Lisbon.  Now we instead have two eddies a bit farther north, with the offshore eddy circled in yellow.  If you follow the currents in towards the inshore eddy, your path will look something like the black line.


If you now superimpose a snapshot of the vessel traffic off Spain & Portugal, we see the black line crosses through a highly trafficed region.  The safer eddy is the one in the yellow circle.  Looks like we will try to follow the current in then stop inside the yellow eddy.


Update on a cloudy Tuesday, but it is sunny in our heads….

Tuesday, November 10th, 2009

We had a great telecon yesterday.  I look forward to another great call today! The decision was to conduct two experiments.  The first experiment which was championed by Pierre was to send one glider North to survey the Hudson Canyon which shows some interesting features. Pierre's plan and reasoning was laid out in some figures which I have posted below.





The second experiment was assess how different models impact the glider path planner.  Using the JPL tools we checked with each glider the projected paths over the course of day.  The potential envelops of the glider being able to reach a specific location varied with model, not surprising as all the models show some differences.  This reflects differences in the models, the assimilation schemes, the assimilation data used, etc.  We for each glider chose a track where the "reachability" envelops between the different models showed the greatest differences.  For the three gliders, this lead us to send two gliders to the south and send the third north to complement the glider surveying the Hudson canyon.  we have another satellite pass on the 12th, so today's discussion will need include some of that location choices.  Unfortunately today is very cloudy,,,, it better clear out before the Hyperion system arrives.

JPL executive summary 11/10/2009

Tuesday, November 10th, 2009

Southerly winds are observed Tuesday with relatively weak amplitude (less than 10 knots). NAM forecast indicates a transition to the Northerly and Northeasterly winds in the next two days with increasing amplitude reaching 20 knots by Thursday. Excellent SST images are obtained on Sunday. No microwave data (TMI+AMSRE) were available Sunday, confirming the important role of the geostationary satellite data in the blending process. SST comparisons consistently suggest a band of warm model bias at the shelf break, probably due to the mislocation of the SST front simulated by these relatively coarse resolution (~4-km) models. The HF radar data on Sunday show a northward flow on the southern shelf, and an offshore flow north of the NY harbor. While the northward flow on the shelf is reproduced by most models, the four models show major differences in simulating the offshore flow on the northern shelf. We have added the UDel glider (ud134) to the glider data vs model comparison. It is interesting to note that the COAWST model has the near perfect agreement with glider temperature on the shelf, but the largest discrepancy in temperature off-shore (~3 deg) and in glider salinity on the shelf (~1 psu).

Putting the Pieces Together

Tuesday, November 10th, 2009

Hi all,

This is Dani and Melissa from the waves group.  We are currently in the process of putting all of our data together in one file.  Once this is finished, we will be able to send all of our data to Igor, and we will have everything in one place to be able to look at it and come to a conclusion about what the waves will be like.

~Dani and Melissa

75 kilometers to Spanish water…

Tuesday, November 10th, 2009

75 kilometers to Spanish waters. -

Boats Ships and More

Tuesday, November 10th, 2009

Hello everyone.
History group here with another up date on our historic crossings. We have almost all of the ships put into Google earth for a kmz, unfortunately we were unable to get the file up because of some hardware difficulties. (Thanks to a broken computer screen due to a crowded EE).

I should be up with in the next few days, and keep a look out for other kmzs including that for human crossings and other (turtles, tuna, garbage etc)

-Historic Crossing Group

75 kilometers to Spanish waters.

Tuesday, November 10th, 2009

Drake continues to make steady progress to the east, holding the line perfectly.  A truly amazing test. We'll soon move the waypoint out farther to the east and keep going.


Zooming into Scarlet, we see she is 75 kilometers (thin white line) from the Spanish EEZ (the thin yellow arc).  The pitch adjustment made yesterday looks like it increased Scarlets forward speed to 16 cm/sec.  Thats nearly 14 km/day on her own.  Satellite altimetry says currents are also to the east.



Planning for where we send Scarlet once she enters the Spanish EEZ has become the topic of discussion. The eddy that was in the green zone has evolved into a loop in a strong jet that heads south to Lisbon - our Plan B for recovery.  The yellow zone shows an eddy that has developed inside the Spanish EEZ and is offshore of 12 W (think yellow north-south line). Thats one place we can park. Another option is to try to ride around the outer edge of the loop in the green zone, jump out and head in along the orange  line.  The worry there is the increase in ship traffic.




We couldn’t wait for success, so we went ahead without it.

Tuesday, November 10th, 2009


The data that has been coming in from the HFRadar sites run by Puertos del Estado has stopped for the moment. While they figure out how to fix the CODAR sites, we have been keeping busy finishing up some other projects. We have finally set up a script that automatically takes the newest MARCOOS OI Total (surface currents) and plots it in Google Earth. This script runs at five past the hour, every hour. Next, we will add a color contour plot to more easily distinguish surface current velocities.

We also finished up the Scripps National Network Codar Site Information KMZ. This script grabs the current operational status of every HF Radar site across the United States and plots it in Google Earth. Clicking on the placemark gives you the sites operational status. With just the click of a mouse in Google Earth, we can now tell if one of ours or our partners HF Radar sites are down. After many months of figuring out how to write in KML and operate the ironman server, we finally have successfully finished these two automatically updating KMZs!


There is still some trouble plotting the PLOCAN Satellite data into Google Earth. This is going to be our priority for the rest of this week.


Mike and Lisa

Rain, Rain, Rain and more Rain :-(

Tuesday, November 10th, 2009

Hello All,

This week Nilsen and I looked for more Jet stream images and We hit the jackpot (sort of). While going through countless images of the jet stream we stumbled across a British website that actually predicted the movement of the Jet Stream a week in advance. Posted below are the 7 images for this coming week. To accompany these images we also posted the precipitation forecast for each day this week. We anticipate the conditions in the region to continue to deteriorate as we get closer to winter.

Justin and Nilsen















“We may have all come on different ships, but we’re in the same boat now.” – Martin Luther King Jr.

Tuesday, November 10th, 2009
November 5th, 2009-- 3:21 pm

November 5th, 2009-- 3:21 pm

This image was taken on Thursday November 5th at 3:21 pm.  It looks like most of the shipping traffic is confined to the shipping lanes at the Port of Vigo.  The ship that is closest to the glider is at 42 degrees North, 10 degrees West.

November 10th, 2009-- 12:47 am

November 10th, 2009-- 12:47 am

The image above was taken on Tuesday, November 10th at 12:47 am.  There is a lot of heavy traffic here off the coast of Spain and Portugal.  Many ships can be seen outside of the shipping lanes and further than 10 degrees West from the shore.  There are many ships at 11.23 degrees West, however there are a few that drift out towards the 12 degree West mark.  This could be seen as a potential problem when picking up RU 27.

~Leo, Shannon, Amelia