Atmospheric analysis

An atmospheric analysis was a type of tricorder scan of the atmosphere that could be performed from a planet's surface. This form of analysis included a standard magnetic sweep.

Twenty-second century Earth Starfleet probes were also capable of performing an atmospheric analysis, as was performed by a probe sent to the planet Paraagan II from the starship in 2152. The probe analysis was able to determine that the air near the surface of the planet was filled with traces of borocarbons. 

Spock's atmospheric analysis on the planet Gamma Trianguli VI allowed him to determine that that planet's atmosphere completely negated any harmful effects from their sun. 

While stranded on the artificial planet that formerly served as a Kalandan outpost in 2269, Lieutenant Hikaru Sulu was ordered by Captain James T. Kirk to run an atmospheric analysis in effort to learn as much as they could about the planet.

Sulu, who was at the time making a standard magnetic sweep, saw his scans go from zero to a reading that was off the scale, followed by a reverse of polarity that returned back to zero. He noted that he had never seen anything like it, and described it as being like a door opening and then closing again.