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-rw-r--r--driver_nmea0183.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/driver_nmea0183.c b/driver_nmea0183.c
index eb7f050e..e8293491 100644
--- a/driver_nmea0183.c
+++ b/driver_nmea0183.c
@@ -1598,6 +1598,8 @@ static gps_mask_t processGBS(int c UNUSED, char *field[],
* 7) Estimate of bias in meters on most likely failed satellite
* 8) Standard deviation of bias estimate
* 9) Checksum
+ *
+ * Fields 2, 3 and 4 are one standard deviation.
*/
gps_mask_t mask = ONLINE_SET;