Drone Pilot Certification
To fly a drone that weighs more than 0.55lb, you must register it with the FAA. The FAA requires that the drone broadcast a Remote ID. You must include that when registering your drone, unless you register it as recreational.
To get approvals for non-standard flights, you must be a registered pilot. To register as a pilot, you must pass Test 107.
Test 107
https://faa.psiexams.com/faa/login
https://uasdoc.faa.gov/listDocs
https://iacra.faa.gov/IACRA/default.aspx
https://www.faa.gov/training_testing/testing/testing_matrix
Test 107 resources
What is high density altitude?
On a hot, muggy day, the air becomes "thinner" or less dense, and its density at a pilot's location is equivalent to a higher altitude in the standard atmosphere. Thus the term "high density altitude." Reduced power, thrust, lift, less responsive aircraft. https://www.weather.gov/zse/HighDensityAltitude
What is a moist unstable air mass?
An unstable air mass is characterized by warm moist air near the surface and cold dry air aloft. https://glenallenweather.com/alink/20thunder/ingredientsthunderstorms.pdf
Background
https://hamradioprep.com/fpv-drones-using-a-ham-radio-license/ https://www.faa.gov/uas/commercial_operators/become_a_drone_pilot