Between the fixed towers and the light rail sit the campaigns: mobile labs driven around the valley for a week or two, a spectrometer looking up through the whole column, and an aircraft mapping methane from above. They answer a different question from the towers, which is where the sources are rather than what the basin emits in total.
The full register, including the parts not yet processed. A campaign with a status other than ready has no map below, and the reason is given.
| Campaign | When | Platform and instruments | Status |
|---|---|---|---|
| Loading... | |||
Each track coloured by methane above that day's cleanest air, the same convention the TRAX map uses. Bright points are where the lab drove through a plume.
MethaneAIR maps the column-average methane mole fraction from an aircraft. This is the Salt Lake Valley scene, block-averaged so a browser can draw it.
The EM27/SUN spectrometers measure the column-average mole fraction by looking at the sun, so they see the whole atmosphere above the valley rather than air at one height. Daily median of the quality-screened retrievals.