EOS Open House at Gault

Date: February 12, 2025

  • Group Photos of Our Team

Alt Text Alt Text

  • Open House Events

Alt Text Alt Text Alt Text Alt Text

Wrapping up our field campaign on a beautiful day—thank you all for your hard work and dedication 💙✨!


Overnight Observations at Gault

Date: February 11, 2025

  • Radiosonde Launching
    Alt Text

  • Camera Drones

Group pictures of instruments Alt Text

Full-View Observation

  • ACHIEVE Data

ACHIEVE data indicates little to no cloud cover over GAULT during the following time periods:

11:15 to 12:15 UTC
ACHIEVE Data (11:15-12:15 UTC)

11:45 to 12:45 UTC
ACHIEVE Data (11:45-12:45 UTC)

  • Satellite Images

Alt Text

Alt Text Alt Text


AERI, FIRMOS, and FINESSE Measurements at Gault

Date: February 10, 2025

  • Radiosonde Launching
    Alt Text Alt Text Alt Text

Flight 5

Date: February 5, 2025

  • HISRAMS on the Aircraft
    Alt Text Alt Text

  • FIRMOS and antennas for radiosonde in Ottawa
    Alt Text


Flight 4

Date: February 2, 2025

  • Radiosonde Plot

Alt Text | Alt Text

  • AERI Data

Alt Text

Some (presumably) clear-sky AERI spectra.


Flight 3

Date: January 28, 2025

  • Cloud Camera Data from FINESSE at the Gault Nature Reserve

During an overpass of the PREFIRE satellite and an overflight of the NRC aircraft, cloud camera data was collected to observe atmospheric conditions.

Cloud camera on FINESSE

The video shows high cirrus clouds captured over FINESSE.

FINESSE Measuring Under Cirrus Clouds

This photo shows FINESSE operating beneath cirrus clouds in front of the McGill EOS building.

The goal is to integrate the data from the ground-based instruments at Gault, a radiosonde release, data from the aircraft and the overpass of PREFIRE to understand the radiative properties of the atmosphere and thin-ice clouds in the far-infrared both from the top and bottom of the atmosphere.

  • Convair pass above the ACHIEVE radar

Alt Text

This photo shows the Convair aircraft flying over the ACHIEVE W-band radar antenna, along with the sky conditions at the time.

  • Radiosounde Launching

Alt Text

McGill and Imperial College London students preparing to launch a sonde, with the sky conditions at the time.


Flight 2

Date: January 22, 2025

  • Radiosonde and Aircraft

Alt Text

  • Aircraft Route

Alt Text Alt Text

  • Ground Instruments

Alt Text

  • AERI Data

Alt Text

  • FIRMOS Data
    FIRMOS quick look spectrum from the measurements taken at NRC, Ottawa Jan 22, 2025 at 17:34 UTC during aircraft ascent.

    Alt Text

  • GOES-East GLM Images

    • Morning Pass Morning Cloud Pass

    • Afternoon Pass Afternoon Cloud Pass


Ottawa Ground Measurements in Clear Sky

Date: January 20, 2025

  • FIRMOS Data
    FIRMOS quick look spectrum from the measurements taken at NRC, Ottawa Jan 20, 2025 at 19:23 UTC. Alt Text

Test Flight

Date: January 17, 2025

  • Radiosonde Launch

Alt Text Alt Text

  • Panoramic of AERI and FINESSE

Alt Text

  • AERI Data

Alt Text

  • FINESSE

Alt Text