Hayley Evers-King

Hayley Evers-King

Marine Application Expert working to bring data from space to people working with, in, and on our beautiful oceans! Also likes to make satellites out of cake...

Location Darmstadt, Germany

Activity

  • Ah ok! For an introduction - I recommend these lectures - https://github.com/jmartinezheras/2018-MachineLearning-Lectures-ESA. We had Jose come and speak at EUMETSAT a while ago and I (as a non-ML but EO expert) found them great!

  • Hi @MasiasiRonaldMushikoma. Adding to what @CarlosFortunyLombraña said - we offer some detailed training courses at EUMETSAT - see https://training.eumetsat.int for details.

  • Not MOOCs but I can recommend checking out the general training opportunities at https://training.eumetsat.int. We use Python a lot in many trainings, at various levels, all focused on EO data.

  • @LiviuIoan I can recommend checking out the general training opportunities at https://training.eumetsat.int. We use Python a lot in many trainings, at various levels, all focused on EO data.

  • The notebooks are available here: https://github.com/wekeo/ai4EM_MOOC :)

  • Hi Martin, They link to the same playlist - the intro video is just the first one of the playlist. You should be able to see various others on the right. Note these are just short videos from previous training events - not directly related to the MOOC. Best wishes, Hayley

  • You get a free trial period with any of the plans for the virtual machines :) How long depends on the size of plan you request (more details here https://www.wekeo.eu/pricing)

  • We'll cover some use of Sentinel-2 for the marine domain in ocean week :)

  • Hi Iago. The WEkEO HDA had some problems this morning but should be working now, please try again. We have updated the WEkEO interface a little since I filmed the walk-through video some time ago, you can see your jobs in the data viewer now.

  • Hi Amit, Please try again, the WEkEO HDA had a problem but should be working fine now.

  • Hi Harlee. Great question! There are various ways you can look at coverage and/or predicted overpasses. It can vary a lot by satellite and sensor (because of the ways they measure, and the tradeoffs needed in missions design). You can find information on coverage for the Sentinel-3 data in our user handbooks (here's an example for S3 OLCI, see coverage maps on...

  • Hi Acelya, I can tell you a bit about Sentinel-3 and how it measures colour! The Sentinel-3 satellites have the OLCI (Ocean Land Colour Instrument) on board - https://www.eumetsat.int/olci. It's a radiometer and it measures light reflected from the Earths surfaces in 21 narrow wavebands (so around 21 different wavelengths), mostly in the visible part of the...

  • Unfortunately for validation of optical data we can't match up with the satellites when the weather is bad :( The data collected can still be useful for algorithm development though.

  • Completely agree Philippe! I think we are starting to get better at it (I couldn't have imagined a MOOC like this when I started my PhD), but we need to keep working and it's something I'm personally trying to champion. There are more and more people from the field on twitter these days - so that's a good platform to hear from the industry.

  • Hi Johnson. It depends on the way you are conducting your satellite validation, and the situation (oceanographically) that you are measuring. For example, in very dynamic coastal regions where properties vary quite rapidly in time and space, we might want stringent criteria (of the order of a few hours). For validation of merged/lower resolution products,...

  • Correct Jenny. Uncertain times at the moment.

  • This is a very salient point, and is the reason why we tend to use multiple sources of data for investigating the carbon cycle. Here's one project I've been involved in recently that used in situ, satellite, and modelled data http://www.oceancarbon.net/

  • We did - beautiful place! I love that they have an underwater trail that you can follow :)

  • I do often wish I could have eyes as sensitive as the radiometers aboard our ocean colour satellites :) Generally we're only good at detecting really drastic changes in the coastal zones.

  • You might all be interested in this hot-off-the-press paper on the topic of collecting ocean data through recreational activities: https://www.frontiersin.org/articles/10.3389/fmars.2017.00351/full

  • There's some examples from a UK perspective here: http://www.spaceforsmartergovernment.uk/defra-eo-coe/

  • Lots of new areas of application - here's a recent project that will bring socio-economists and satellite scientists (as well as many others) together: http://www.pml.ac.uk/News_and_media/News/Supporting_coastal_communities_in_Southeast_Asia

  • Generally yes, they can have big impacts on our activities, but also on near shore species who can't move too far - have a look at the lobster walk outs that occur on the west coast of South Africa. I've also seen some reports of impacts on seals and whales during particularly large blooms.

    The shellfish industry can be substantially impacted as you say - I...

  • GM is correct :)

  • Hi all,

    I'm away in Ghana this week - so my internet connection is not very good - I will get a more detailed reply for you soon!

    Best wishes,

    Hayley

  • Hi Sheila,

    The depth to which an ocean colour satellite can "see" varies, depending on what's in the water. They are passive sensors, so they are receiving light that is reflected back from the ocean. If there are lots of things in the water absorbing or scattering light, the depth to which light from the sun will reach decreases, and as such the depth to...

  • Unfortunately Bilko was only designed for windows...but I did put together an install guide for Mac using wine...you should be able to follow a similar installation process on Ubuntu/Linux. Guidelines are here: http://www.learn-eo.org/software.php

    Alternatively there's a version of this tutorial using the SNAP software that's just been very recently...

  • Not an easy task in a large and complex ocean - but some interesting studies pointing to possible sights based on found wreckage: https://phys.org/news/2017-01-oceanographic-analysis-potential-site-mh370.html

  • Hi Hardeep,

    You might need to try a different browser. For me it works on google chrome.

    Hayley

  • More content on algal blooms coming up in the following weeks :) Always happy to talk about these topics as they are a particular focus of my area of research :)

  • It's all about the algorithms! That said, some are quite simple - empirical functions that use two measurements of light at different wavelengths, where as others can get really complicated (I've worked with some that are attached to full radiative transfer models, and use different models of particles to estimate components of the ocean colour signal).

  • Yep! And it's not always easy, we have fairly good protocols developed for measuring POC for example, but extracting the phytoplankton component of that is a little more difficult.

  • Hi David,

    Since this video was filmed Victor and I have actually published a paper on the topic of POC estimation from space :) It's open access so you can have a look at it here: https://www.frontiersin.org/articles/10.3389/fmars.2017.00251/full

    Hayley

  • On uncertainties in particular - there's been some very interesting work done under OC-CCI project, and also under recent programmes to drive towards quantifying uncertainty using best metrology principles - I'm involved in one project on that and you can see some of the early stage outputs here: http://amt4sentinelfrm.org/International_Workshop There will...

  • Hi Murdoch,

    There is a vast amount of literature around these topics - probably far too much for me to summarise in 1200 characters ;)

    Thankfully much of it these days is open access - you might like to read some of the articles in a recent special issue of the Frontiers journal, which features a lot of the work presented at a recent Colour and Light in...

  • Hi GM,

    I'll try and boot up Bilko on my laptop and see if I can double check this for you over the next few days.

    Hayley

  • Lots of data and plots for the time series here: http://www.westernchannelobservatory.org.uk

  • Agreed Murdoch, though I will say it wasn't the most interesting day oceanographically on Plymouth Sound when we filmed :) If you'd like to see some data in more detail from this area, check out the Western Channel Observatory (http://www.westernchannelobservatory.org.uk/) they have data in real time from the buoys which Quest (in the video) goes out every...

  • I think it's meant to be ocean, but this is actually the first time I noticed it ;) That said, these things do influence the atmosphere too - coccolithophores play a really key role in the carbon cycle, particularly in the carbonate equilibria system which regulates how much carbon the ocean can absorb from the atmosphere, and the acidity of the ocean too....

  • So glad you love Ocean Colour Kenneth - I too am constantly astounded by the beauty in this topic! It's a pleasure to share that with you :)

  • Hi Patricia,

    Yes definitely - there are things satellites can't easily see or estimate that we can measure in situ. But we can often relate the measurements each one can make, to the other to get better insight in to spatial and temporal variability. e.g. satellites can give us an idea of the temperature/productivity of an area, which we might relate to in...

  • Hi David,

    We have a team here at PML that works on aircraft data (part of http://arsf.nerc.ac.uk/index.asp) - incredible data but as you say quite expensive to collect!

    One project I'm working on is looking at drone mounted sensors to support our validation efforts - all this new technology is really cool :)

    Hayley