HARBOR Flight Data File Names
General Convention:
File names start with HAR to indicate HARBOR. If there is nothing else, this typically means a free flying balloon system.
HARAero means that it is the Aerostat as flown by the HARBOR team. That means that HARAero data are all limited to approximately the bottom 500 feet of the atmosphere above ground level. These are all tethered flights.
The next indicator is the flight instrumentation. Thus,
- HARAeroOzone = the ozonesonde flown under the aerostat by the HARBOR team.
- HARAeroAtmoSniffer = the AtmoSniffer flown under the aerostat by the HARBOR team.
- HARAeroBeacon = the Mini-Beacon flown on the aerostat by the HARBOR team.
The next designation is the date in descending order yymmdd or yyyymmdd.
The next designation is a dash followed by the START of the data flight or collection. This is in 24-hour format in local time. NOTE: any given file might contain multiple flights, so the start time is for the first flight.
Example: HARAeroOzone_20170202-720 = Ozonesonde data taken on Feb. 2, 2017 on a flight under the aerostat that started at 0720 MST.
Currently some AtmoSniffer data files are less obvious, the UWFPS file names have all be updated though. We are working on older files. In those directories the files are named either with the date-time designation or with a number that indicates a sequential save. That is, the AtmoSniffer was turned off then back on and a new set of files was created with the next number. The file types are:
- dyn = dynamics = accelerometer, gyroscope, and magnetometer (each in x,y,z axes)
- env = environment = internal temperature, pressure, internal relative humidity, and battery status. By "internal" this is the temperature at the outlet of the preheater board (i.e., after the air has passed over the heater). Currently there is no external ambient data being collected on these, we are working on that.
- event = an autogenerated text document with some information about the flight. This is a good document to edit with any additional notes about the flight and/or analysis.
- gas = gas sensor data = internal temperature at the gas sensors, NH3, NO2, mass air flow, O3, CO, %RH at the gas sensor board, pressure, CO2 (currently off line), SO2.
- gps = GPS = Contains the standard NEMA GPS sentence $GPGGA which includes UTC time, latitude, longitude, number of GPS satellites being read, HDOP (the "horizontal dilution of precision") which is a measure of uncertainty in position in meters (vertical precision is always worse), altitude in meters, then other data we don't need.
- pm25 = PM2.5 = the particle counter output after the air has gone through a particle separator filter that removes all particles larger than 2.5 microns in diameter. This is shown as a raw voltage then as an estimated mass per cubic meter using standard assumptions of particle density.
- NOTE: All of these files also include UTC time, mission time (time from the start of the data collection in seconds), and altitude above sea level in meters. These are all taken from the GPS data.