I need to take a set of datafiles, generated by our sensor system that reads GPR (Ground penetrating Radar) deviations over a surface as we drive along. I have discrete readings from a set of sensors and can accurately place them relative to the GPS unit spitting out location values once a second, along with track and speed in meters/second. I want to create an Esri ASCII data file for each second, with each row representing the sensor values along the rail, with one row representing all 16 sensors (spaced equally apart), read every 1/25th of a second. I can figure out the offsets to accurately place the sensors, in meters, relative to the GPS unit and as each sensor is read. It is relatively easy to then figure out the location for each reading along the track the GPS unit is measuring in Meters/second, thus arriving at the separation, in meters, between rows of generated sensor data.
What I am having a hard time doing is converting this information into ESRI ASCII format, specifically the CELL size. My sensor rack is about 4 meters long and the GPS unit is centrally located with a small offset forward of the sensor array. How can I determine the cell size for my many rows of sensor data? I will locate this data with the GPS output, and have no problem calculating the boundaries for the one second time period. What has me stumped is the cell size.
Example data: Sensors 1 - 16 232.2 233. 244.4 256.8 260.1 ..... 211.5 next row 0.1 meter later next row 0.1 meter later 25 rows in all
Sensors separated 0.25 meter from each other
Any ideas folks? What does that pesky cell size have to be and more importantly, how did you figure out that number?