Simplified CSV output | OnFlight Hub and Hub Plus

Choose Simplified CSV for flight review and plotting with fewer columns. The output name ends in _simple.csv. As in Full CSV, the first three rows contain pilot and aircraft information, row 4 contains column names, and recorded measurements begin on row 5.

Aircraft attitude, speed, and position come from the inertial navigation system (INS). Headings and ground tracks in this output are magnetic. Use Full CSV or MATLAB when you need raw measurements, true heading and track, yaw rate, or more detailed sensor status.

UTC comes directly from the GPS receiver on Hub. Hub Plus uses a clock synchronized to the receiver’s one-pulse-per-second signal to timestamp samples between pulses. See Time information for details.

Always-present fields

Sys Healthy shows whether the Hub’s internal sensors report normal operation and its electronics temperatures are within limits. Initialized separately shows whether the navigation system has completed initialization. Full CSV includes an additional INS Healthy field for navigation-system health.

Batt Status is ok, warn, or low for the Hub battery. The remaining base columns are:

CSV header	Description
`Initialized`	True when the navigation system has completed initialization.
`Sys Time [s]`	Time since the Hub was turned on, in seconds. Resolution is 1 millisecond (0.001 s) for Hub and 1 microsecond (0.000001 s) for Hub Plus.
`UTC Year`	UTC year.
`UTC Month`	UTC month.
`UTC Day`	UTC day.
`UTC Hour`	UTC hour.
`UTC Min`	UTC minute.
`UTC Sec`	UTC seconds: whole seconds for Hub; microsecond resolution (0.000001 s) for Hub Plus.
`GNSS Fix`	GNSS fix status, 0 = no fix, 2 = 2D fix, 3 = 3D fix, 4 = differential GNSS.
`GNSS Num Sats`	Number of satellites used to calculate position.
`GNSS Horz Pos Acc [ft]`	Estimated horizontal position accuracy, ft.
`GNSS Vert Pos Acc [ft]`	Estimated vertical position accuracy, ft.
`GNSS Vel Acc [kts]`	Estimated velocity accuracy, knots.
`Pitch [deg]`	Pitch, positive nose up, deg.
`Roll [deg]`	Roll, positive roll right, deg.
`Mag Var [deg]`	Magnetic variation, +/-180, deg (positive east).
`Heading Mag [deg]`	Heading relative to magnetic north, degrees.
`Climb Rate [ft/min]`	Climb rate, ft/min.
`Load Factor [G]`	Aircraft load factor, in g.
`Roll Rate [deg/s]`	Roll rate, positive rolling right, degrees per second.
`Pitch Rate [deg/s]`	Pitch rate, positive pitching nose-up, degrees per second.
`Gnd Spd [kts]`	Ground speed, knots.
`Gnd Track Mag [deg]`	Direction of travel over the ground relative to magnetic north, degrees.
`Alt WGS84 [ft]`	Height above the WGS84 ellipsoid, ft.
`Alt MSL [ft]`	Height above Mean Sea Level, ft.
`Lat [deg]`	Latitude, deg.
`Lon [deg]`	Longitude, deg.
`Cabin Pres [Pa]`	Filtered internal (cabin) static pressure, Pa.
`Cabin Pres Alt [ft]`	Cabin pressure altitude, ft.

Optional sensor columns

Optional sensor columns appear when the recording contains a connected sensor that provides them. A sensor may have been connected for only part of the recording. Full CSV includes more detail about when sensors were connected and measurements were available.

Group	When included and what the status means
Air data	Included when an external air-data source was connected. `Airdata Healthy` shows whether its temperature and pressure sensors, and any available outside-air-temperature (OAT) and angle-of-attack (AOA) sensors, report normal operation. `Airdata Batt Status` is `ok`, `warn`, or `low`.
OAT	`Airdata OAT [C]` appears when OAT was available from the connected air-data source.
AOA	`Airdata AOA Type` and `Airdata AOA` appear when AOA was available. Type is `angle [deg]` or `pres ratio`.
Calibrated airspeed	`Airdata KCAS` appears when calibrated airspeed was available.
Wind	Wind speed and magnetic direction appear when a wind estimate was available.
AGL	Included when an AGL source was connected. `AGL Healthy` describes sensor operation and temperature. Check `AGL In Range` separately where provided. `AGL Batt Status` is `ok`, `warn`, or `low`. `AGL In Range` is omitted when Stadia was detected.
Heart rate	Included when a heart-rate source was connected.
Analog inputs	Each external analog channel appears when connected. `AIN0 Healthy` describes sensor operation and temperature; `AIN0 Batt Status` is `ok`, `warn`, or `low`. The same applies to channels 1–3.

The following tables describe the measurements available from each sensor group.

Air data

CSV header	Description
`Airdata Static Pres [Pa]`	Filtered static pressure, Pa.
`Airdata Diff Pres [Pa]`	Filtered differential pressure, Pa.
`Airdata OAT [C]`	Filtered OAT, C.
`Airdata AOA`	Angle of attack in degrees or pressure ratio, as selected by Airdata AOA Type.
`Airdata KIAS`	Indicated airspeed, knots.
`Airdata KCAS`	Calibrated airspeed, knots.
`Airdata KTAS`	True airspeed, knots.
`Airdata Pres Alt [ft]`	Pressure altitude, ft.
`Airdata Density Alt [ft]`	Density altitude, ft.
`Airdata Wind Spd [kts]`	Estimated wind speed, knots.
`Airdata Wind Dir Mag [deg]`	Estimated wind direction relative to magnetic north, deg.

AGL altitude

CSV header	Description
`AGL In Range`	True when the altitude is within the altimeter’s measurement range.
`AGL Alt [ft]`	Height above ground reported by the altimeter, ft.

Heart rate

CSV header	Description
`HR BPM`	Heart rate, beats per minute.

Analog inputs

CSV header	Description
`AIN0 Volt`	Analog input voltage, V.
`AIN0 Val`	Sensor reading after calibration; units depend on the channel setup.
`AIN1 Volt`	Analog input voltage, V.
`AIN1 Val`	Sensor reading after calibration; units depend on the channel setup.
`AIN2 Volt`	Analog input voltage, V.
`AIN2 Val`	Sensor reading after calibration; units depend on the channel setup.
`AIN3 Volt`	Analog input voltage, V.
`AIN3 Val`	Sensor reading after calibration; units depend on the channel setup.

Hub Plus recordings

Hub Plus recordings include the additional time information described under Hub Plus recordings. They also include voltage and calibrated values for all four onboard analog channels. Column names include the assigned controls when that information is available.