First test of Swift Navigation Piksi Multi dGPS

These new dGPS units seem to be accurate to around 2cm as shown in our test. This is for a close baseline (and at the moment doesn’t use GLONASS).

Testing the Piksi Multi from Swift Navigation. North/East relative position of rover – in a 96s test in an open space. The readings are quoted as accurate to 0.023m H 0.037m V.

Iceberg Tracker moves on but seems in trouble

Iceberg tracker temperatures from 9/8/16 to 7/10/16

Iceberg tracker temperatures from 9/8/16 to 7/10/16

We have been checking the iceberg tracker temperature as one way of telling if it is in the sea is a flatter daily variation in temperatures. Here you can see it did regularly read sub-zero at midnight then warmer an noon. Recently however it is showing mainly positive temperatures.

iceberg tracker locations up to 7/10/16

iceberg tracker locations up to 7/10/16

After spending weeks among the small islands in the centre of this map – it has moved south until reaching land again. This dramatic movement may be because the iceberg has broken up.

View of the icebergs when the tracker was deployed

this shows the glacier-sea front where icebergs calve (Photo: Formula E)

this shows the glacier-sea front where icebergs calve (Photo: Formula E)

The sea near the glacier - with a variety of icebergs (Photo Formula E)

The sea near the glacier – with a variety of icebergs (Photo: Formula E)

Formula E driving on a glacier in Greenland. This photo shows the icebergs in the sea - like the one we are tracking from here. Photo courtesy Formula E team.

Formula E car driving on a glacier in Greenland. This photo shows the icebergs in the sea – like the one we are tracking from here. Photo courtesy Formula E team.

Iceberg tracker

This is a GPS tracker we quickly built as a test of tracking icebergs – it uses Satellite (Iridium) short text messages to send its location to us every 12hrs. Inside is a large lithium battery pack. The photo below shows a water test in the sink – just in case it ends up in the sea. We used a unit from YB Tracking. More info later!

GPS satellite tracker we built for a test on a Greenland iceberg

GPS satellite tracker we built for a test on a Greenland iceberg

Getting going on CT analysis of till texture

We’re investigating the texture of till using CT scans. This shows successive sections through a sample.

Animated CT volume

Moving along the z-axis through a CT volume

The first step in the analysis is to extract the shapes of the clasts (rock fragments) embedded in the sample. These show up mainly as red in the sections above. The shape below is a clast about 3 mm long.clast

Fieldwork June 2013

We are back in Iceland on June 6th – rather early for the snow it seems!

The snow on the moraine and road was very deep. Here you can just see the top of the GPS antenna (which is on a tripod!) and the camera.

The snow on the moraine and road was very deep. Here you can just see the top of the GPS antenna (which is on a tripod!) and the camera.

after a lot of digging we reached the dGPS box so we could copy the data

after a lot of digging we reached the dGPS box so we could copy the data

we usually use the ladder to get up to the balcony where our reference station lives - but there was so much snow we could just walk up! The panel wifi antenna had self-destructed but the long range WiFi was still ok.

we usually use the ladder to get up to the balcony where our reference station lives – but there was so much snow we could just walk up!
The panel wifi antenna had self-destructed but the long range WiFi was still ok.