diff --git a/part_iii_-_opentx_lua_api_reference/general-functions-less-than-greater-than-luadoc-begin-general/gettxgps.md b/part_iii_-_opentx_lua_api_reference/general-functions-less-than-greater-than-luadoc-begin-general/gettxgps.md
index 001fdae..ba0e178 100644
--- a/part_iii_-_opentx_lua_api_reference/general-functions-less-than-greater-than-luadoc-begin-general/gettxgps.md
+++ b/part_iii_-_opentx_lua_api_reference/general-functions-less-than-greater-than-luadoc-begin-general/gettxgps.md
@@ -15,8 +15,8 @@ none
   * `lon` \(number\) internal GPS longitude, positive is East
   * 'numsat' \(number\) current number of sats locked in by the GPS sensor
   * 'fix' \(boolean\) fix status
-  * 'alt' \(number\) internal GPS altitude in 0.1m
-  * 'speed' \(number\) internal GPSspeed in 0.1m/s
+  * 'alt' \(number\) internal GPS altitude in m
+  * 'speed' \(number\) internal GPSspeed in 1cm/s
   * 'heading'  \(number\) internal GPS ground course estimation in degrees \* 10
-  * 'hdop' \(number\)  internal GPS horizontal dilution of precision
+  * 'hdop' \(number\)  internal GPS horizontal dilution of precision (std. \* 100, good signal approx. 100)