A GPS track file is a chronological record of the positions, speeds and accuracy figures a Deep and Steep GPS altimeter captured during a skydive. GPS tracks are saved as a CSV file on the altimeter, one row per sample. Sync it to the Deep and Steep app to review the GPS track data from each jump, or open the file itself to work with the raw numbers.
Track File Fields #
Each row in the file is one sample, and every sample carries the same fields:
| Field | What it holds |
|---|---|
time | Date and time of the sample, in UTC (Coordinated Universal Time) |
lat | Latitude, in decimal degrees |
lon | Longitude, in decimal degrees |
hMSL | Height above mean sea level (MSL), in meters |
velN | Velocity north, in meters per second |
velE | Velocity east, in meters per second |
velD | Velocity down, in meters per second |
hAcc | Horizontal accuracy, in meters |
vAcc | Vertical accuracy, in meters |
sAcc | Speed accuracy, in meters per second |
gpsFix | GPS fix type |
numSV | Number of satellites used for the position fix |
heading | Heading of motion across the ground, in degrees |
headAcc | Heading accuracy, in degrees |
Sending a Track to the App #
The Deep and Steep app reads GPS tracks straight off the altimeter, so most jumps never need the CSV opened by hand.
For the full connection procedure, and what the altimeter does while it is connected, read App Connect.
Copying a Track File to a Computer #
To work with the raw numbers, pull the CSV off the altimeter with “USB Connect” mode, which makes the altimeter appear as a USB drive. For the procedure, read the USB Connect section of Logbook.
Sample Track File #
Download a sample GPS track file to see the format before you open one of your own.
Your own tracks are stored in the altimeter’s onboard memory. To learn more about you altimeter’s GPS track recording settings, see GPS Tracks and Recording Options.
