From ed916327fc21f963c762592261435b039b370e31 Mon Sep 17 00:00:00 2001
From: "Dr.-Ing. Amilcar Do Carmo Lucas" <amilcar.lucas@iav.de>
Date: Tue, 2 May 2017 15:41:06 +0200
Subject: [PATCH] AP_Baro: Use SI units conventions in parameter units

Follow the rules from:
http://physics.nist.gov/cuu/Units/units.html
http://physics.nist.gov/cuu/Units/outside.html
and
http://physics.nist.gov/cuu/Units/checklist.html
one further constrain is that only printable (7bit) ASCII characters are allowed
---
 libraries/AP_Baro/AP_Baro.cpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/libraries/AP_Baro/AP_Baro.cpp b/libraries/AP_Baro/AP_Baro.cpp
index d0f4350412..9d599d69fd 100644
--- a/libraries/AP_Baro/AP_Baro.cpp
+++ b/libraries/AP_Baro/AP_Baro.cpp
@@ -56,7 +56,7 @@ const AP_Param::GroupInfo AP_Baro::var_info[] = {
     // @Param: ABS_PRESS
     // @DisplayName: Absolute Pressure
     // @Description: calibrated ground pressure in Pascals
-    // @Units: pascals
+    // @Units: Pa
     // @Increment: 1
     // @ReadOnly: True
     // @Volatile: True
@@ -66,7 +66,7 @@ const AP_Param::GroupInfo AP_Baro::var_info[] = {
     // @Param: TEMP
     // @DisplayName: ground temperature
     // @Description: calibrated ground temperature in degrees Celsius
-    // @Units: degrees celsius
+    // @Units: degC
     // @Increment: 1
     // @ReadOnly: True
     // @Volatile: True
@@ -79,7 +79,7 @@ const AP_Param::GroupInfo AP_Baro::var_info[] = {
     // @Param: ALT_OFFSET
     // @DisplayName: altitude offset
     // @Description: altitude offset in meters added to barometric altitude. This is used to allow for automatic adjustment of the base barometric altitude by a ground station equipped with a barometer. The value is added to the barometric altitude read by the aircraft. It is automatically reset to 0 when the barometer is calibrated on each reboot or when a preflight calibration is performed.
-    // @Units: meters
+    // @Units: m
     // @Increment: 0.1
     // @User: Advanced
     AP_GROUPINFO("ALT_OFFSET", 5, AP_Baro, _alt_offset, 0),
@@ -108,7 +108,7 @@ const AP_Param::GroupInfo AP_Baro::var_info[] = {
     // @Param: ABS_PRESS2
     // @DisplayName: Absolute Pressure
     // @Description: calibrated ground pressure in Pascals
-    // @Units: pascals
+    // @Units: Pa
     // @Increment: 1
     // @ReadOnly: True
     // @Volatile: True
@@ -122,7 +122,7 @@ const AP_Param::GroupInfo AP_Baro::var_info[] = {
     // @Param: ABS_PRESS3
     // @DisplayName: Absolute Pressure
     // @Description: calibrated ground pressure in Pascals
-    // @Units: pascals
+    // @Units: Pa
     // @Increment: 1
     // @ReadOnly: True
     // @Volatile: True