WX FCST and FLT Plans till 21 AUG SAT 16: XFER DNK, DNK IMG in PM SUN 17: DNK MON 18: DNK TUE 19: DNK backup WED 20: XFER LSGC, likely build-out THU 21: Thun 8/8 ?

WX Assessment and FLT Plan for SAT 16th AUG 0900 - 1100 LT: XFER LSGC - EDDE 1100 - 1230 LT: Refuel with GPU 1230 LT: T/O, XFER to DNK area for ~1.5 h imaging, then landing in EKRK

Pre-FLT preparations

AVIRIS-4 is en route to Aamosen area, about 170 NM to go. WX clearing up is we proceed north.

Imaging has started on Åmosen mission, sky clear above, some convective clouds to the East.

We have almost completed the western block; now sun angles are getting too low and a denser layer of cirrus is approaching. We finish up with the cross-lines for LIDAR calibration.

WX FCST and FLT Plans till 21 AUG We are experiencing vacuum pump issues and are taking actions to fix this till MON. SUN 17: Sensor maintenance MON 18: DNK TUE 19: - WED 20: DNK backup or XFER LSGC, likely build-out THU 21: Thun 8/8 ?

The spare vacuum hose is doing the job and the pressure vessel is approaching nominal values again 🎉

Pressure keeps going down, the sensor is cooling down! We should be operational again in about 3 hours from now. Planning to start imaging over Åmosen around 1015 LT. AVIRIS-4 rescue mission is completed!

AVIRIS-4 is operational again and we aim at starting imaging in the West around 1015 LT. Skies are currently cristal clear (0/8).

We have completed the crossline # 42, now doing line 13 near Lake Tissø. Will continue working to the E from here.

Line 16 done, now we got some clouds just to the E of us; we switch now to the Eastern lines as there the area is clear.

Mission stopped now due to clouds. AVIRIS-4 returns to Roskilde for refueling and monitoring the weather for another sortie. Lines 20-29 are remaining. Lines 19 and 30 will ideally be repeated.

AVIRIS-4 is airborne again, establishing on line 30. Area is clear!

Åmosen mission is completed! Thanks to the ground team for the WX updates!

AVIRIS-4 is transferring back to Switzerland; goodbye Denmark, till the next time! 🇩🇰

The orthorectified product of our first non-linear flight over the Aletsch Glacier does look promising, apart from the clouds that were present at the time. Activation of the stabilising platform and improved use of avionics for polyline handling may result in smoother results.

AQUARIUS Funding Call – Marine and Freshwater Infrastructure Access ARES is part of the AQUARIUS infrastructure available for water research. Please head to the AQUARIUS webpage to learn more about this call (Open from 2 SEP 2025 – 28 OCT 2025). aquarius-ri.eu/ta-call-2-supe…

We have just published a new article about the FloX instrument calibration and its sensitivity. This may be of interest to all who use these instruments for measurements in their own right, or for radiometric ground control with airborne acquisitions. opg.optica.org/ao/fulltext.cf…

ARES will be attending an event about “Data Technologies for the Humanities and Social Sciences” on 22nd October. Come and see us there to discuss what our platform can do for you.