3DR Iris with Parrot Sequoia

 The sequoia is unmounted from parrot DISCO, so it comes with a different mount.

using 3D printer to make fixture to fix sequoia under quad, and mount the light sensor on top of quad. But you need to put the sensor on the stern side, in the front there is a GPS inside.

Also need to make extension cable for the connection between light sensor and sequoia.   There are 2 short micro USB (both side)cables, one is form connection to light sensor, the other one serve to supply power to sequoia. I tried to supply 5V through the connection cable between sequoia and sensor, it did not work. So I use a DC-DC to take power from battery and feed 5V into the micro USB cable on Sequoia.

Setting of the seqoia is done through wifi, sequoia will start as a AP, there is a config page on 192.168.47.1

sequoia has own GPS, so you can set a distance between pictures. a calculation assistance is also provided in the config page.

The first test seems fine, although there are ripples on the RGB photos, not the others.

The flight is done at 25m attitude.

The first take in the rice field, I was using the same setting, but seems the rice field has less characteristic , the SW end up with warning. 

I checked photos, every one does contain gps info.

The second try we made to height to 50m, wish to make more terrain structure in each photos.

This time, we have the result:

With certain wave length, we do see the gas emission difference on 2 different field.

The flight takes about 4 mins, distance of grid is about 0.6km, used 1220mah

With the old battery at 5100mah, the current runs at 18-20A. Old battery drop voltage very quickly, planned to use new battery with lower mah to reduce weight.