Current Research Projects


Autonomous Underwater Explorer:
Buoyancy controlled and acoustically tracked swarms of vehicles.
ZOOPS:
A multiview, multimodal acoustic and optical zooplankton sonar and optical imaging system.
OmniCam:
An omnidirectional, high resolution, high speed, imaging system to record the radiometric light field in the open ocean
Oceanic Explorer Game:
A Flash-based game, created to introduce acoustic, visual, and chemical sensing concepts
LUMIS-2:
A portable and multispectral dive camera, designed for rapid in situ fluorescence surveys of coral reefs at multiple emission wavelengths

Ocean Sciences Meeting Comedy Session

Posted Thu, 2014-03-06 09:56 by admin

Dr. Jules Jaffe and Dr. Peter Franks gave two very fun and entertaining talks at the OSM 2014 comedy session. Click the links below to watch the videos.

Jules_And_Peter_TalkPeters_Talk
Jaffe: The 2000 Year Old CopepodFranks: Global Climate Change, the Demographic Albedo Effect

 

 

 

 

 

 

 

Holiday Greetings from the Jaffe Lab

Posted Fri, 2013-12-20 22:28 by paul

Holiday Greetings from the Jaffe LabHoliday Greetings from the Jaffe Lab

Dr. Jaffe Receives Best Paper Award at Ocean Optics XXI Conference

Posted Tue, 2013-07-23 12:12 by paul

Dr. Jaffe received the Best Paper award at the Ocean Optics XXI conference for his paper: Exploiting the Synergies of Underwater Optic and Acoustic Sensing of Animals:

Dr. Jaffe Best Paper Award at Ocean Optics XXIDr. Jaffe Best Paper Award at Ocean Optics XXI

 

 

First Deployment of Laser Imager Tow Sled

Posted Wed, 2013-06-12 17:32 by paul

Last friday we successfully deployed our tow platform for our new laser imaging system. The sled performance was very good and we were able to tow it reliably very close to the bottom with great altitude-keeping performance. In the video below, there is a nice example of strong changes in water color and clarity as the sled decends from the surface down to 50 m. Towards the end of the video note the high abudance of jellies zipping by the sled as it moves through the water at 3.5 knots.

TowSled Deployment


Recording of a Whale Swimming by an Array of AUEs

Posted Fri, 2013-03-15 14:38 by paul

While deploying 6 of our AUEs on a stereo recording rig at 16m depth, we happened to capture a whale swimming near the surface above the AUEs. Tristan Hiatt processed the acoustic data from the AUEs into a great stereo track and overlayed it on a video of the event recorded from the boat. Have a look and listen below, you'll see and hear the whale coming to the surface. It's best with headphones!

WhaleVid


Measurement system for marine animal reflectance functions

Posted Tue, 2013-02-05 14:45 by justin

The journal article "Measurement system for marine animal reflectance functions" by Justin M. Haag, Jules S. Jaffe, and Alison M. Sweeney has been recently published in Optics Express. This paper presents details of the optical instrument design and calibration for a new version of the OSMAR (optical scatterometer for measurement of angular reflectance) system that was described last year. Also included, are scattering patterns for squid and fish species that show interesting similarities in light scatter from two otherwise quite different animals. The physical explanations and potential ecological implications of the observed scattering from these species, as well as from others not yet presented, is a subject of future work.

Benthic Microscope Image of Coral Fluorescence

Posted Fri, 2012-12-21 14:59 by paul

Below is a fluorescence image from our scanning benthic microscope prototype showing GFP and Chlorophyll fluorescence from coral polyps over a large depth of field.

Coral Fluorescence Imaged With Benthic Microscope: field of view 3 mm (h) x 1.5 mm (v)Coral Fluorescence Imaged With Benthic Microscope: field of view 3 mm (h) x 1.5 mm (v)

Successful Field Tests with Free-Drifting Mini-AUEs

Posted Fri, 2012-12-21 12:23 by paul

On Monday we completed our first successful test with multiple, free-drifting Mini-AUEs. This is a major milestone for the project as it marks the first time that the vehicles have been deployed and recovered in the field un-tethered. It is also the first time that multiple units have been deployed together. We released two units programmed to hold roughly a 6m depth while drifting for one hour off Torrey Pines Beach. We did three consecutive 1-hour deployments and all of the critical functions of the vehicles worked perfectly every time. Below are a few photos from the deployment and a example of preliminary data.

 

TwoUnitsUnderWater

TwoUnitsUnderWater

TwoUnitsUnderWater

TwoUnitsUnderWater


Best Student Paper Runner-Up Award

Posted Fri, 2012-10-26 12:09 by justin

The proceedings paper "Measurement System for Obtaining Marine Animal Reflectance Functions" by Justin M. Haag, Alison M. Sweeney, and Jules S. Jaffe was recently selected for the Best Student Paper Runner-Up Award at the Ocean Optics XXI Conference in Glasgow, Scotland. Please also check out the associated poster which provides a summary of the paper as well as a preview of results from our cruise off the Hawaiian islands on the R/V Kilo Moana this past June. Stay tuned as there is much more to come!

First Sea Test with Mini-AUE Unit 1

Posted Wed, 2012-10-24 16:40 by paul

We completed a variety of sea tests on Tuesday with Mini-AUE unit 1. In general things went quite well and we were able to have the vehicle complete several profiles, receive GPS position data, and recover the vehicle. Below is a photo of Paul Roberts programming the vehicle on the boat (Photo Credit: Rich Walsh).

Paul programs a Mini-AUEPaul programs a Mini-AUE

 



Below is a map of two tracks inferred from GPS data (0001 and 0002). The map shows the start position (farther off shore) where the vehicle entered the water and the end position (closer to shore) where it surfaced after completing its profile. The vehicle was underwater for 30 minutes during each profile. Although the profiles were performed at diffferent times, we can see from the trajectories that the current direction and velocity was quite consistent and in both cases the vehicle drifted by roughly 300m towards the shore during the 30 minutes.

Mini-AUE Unit 1 GPS PositionsMini-AUE Unit 1 GPS Positions

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