height_series.add(alt.time, alt.value - ground_altitude);
}
- if (gps_height == null && cal_data.gps_pad != null && gps_altitude != null) {
+ if (gps_height == null && cal_data.gps_pad != null && cal_data.gps_pad.alt != AltosLib.MISSING && gps_altitude != null) {
double gps_ground_altitude = cal_data.gps_pad.alt;
gps_height = add_series(gps_height_name, AltosConvert.height);
for (AltosTimeValue gps_alt : gps_altitude)