Index: trunk/FACT++/src/drivectrl.cc
===================================================================
--- trunk/FACT++/src/drivectrl.cc	(revision 18360)
+++ trunk/FACT++/src/drivectrl.cc	(revision 18361)
@@ -3323,20 +3323,20 @@
         ("addr,a",                   var<string>("sps:5357"),   "Network address of cosy")
         ("verbosity,v",              var<uint16_t>(0),          "Vervosity level (0=off; 1=major updates; 2=most updates; 3=frequent updates)")
-        ("pointing.model-file",      var<string>()->required(), "")
-        ("pointing.max.zd",          var<double>( 104.9),       "")
-        ("pointing.max.az",          var<double>(  85.0),       "")
-        ("pointing.min.zd",          var<double>(-104.9),       "")
-        ("pointing.min.az",          var<double>(-295.0),       "")
+        ("pointing.model-file",      var<string>()->required(), "Name of the file with the pointing model in use")
+        ("pointing.max.zd",          var<double>( 104.9),       "Maximum allowed zenith angle in sky pointing coordinates [deg]")
+        ("pointing.max.az",          var<double>(  85.0),       "Maximum allowed azimuth angle in sky pointing coordinates [deg]")
+        ("pointing.min.zd",          var<double>(-104.9),       "Minimum allowed zenith angle in sky pointing coordinates [deg]")
+        ("pointing.min.az",          var<double>(-295.0),       "Minimum allowed azimuth angle in sky pointing coordinates [deg]")
         ("pointing.max.residual",    var<double>(1./32768),     "Maximum residual for a pointing operation [revolutions]")
-        ("pointing.velocity",        var<double>(0.3),          "")
-        ("pointing.acceleration.az", var<double>(0.01),         "")
-        ("pointing.acceleration.zd", var<double>(0.03),         "")
-        ("tracking.acceleration.az", var<double>(0.01),         "")
-        ("tracking.acceleration.zd", var<double>(0.01),         "")
-        ("parking-pos.zd",           var<double>(101),          "")
-        ("parking-pos.az",           var<double>(0),            "")
-        ("acceleration.max.az",      var<double>(0.03),         "")
-        ("acceleration.max.zd",      var<double>(0.09),         "")
-        ("weather-timeout",          var<uint16_t>(300),        "")
+        ("pointing.velocity",        var<double>(0.3),          "Moving velocity when pointing [% max]")
+        ("pointing.acceleration.az", var<double>(0.01),         "Acceleration for azimuth axis for pointing operations")
+        ("pointing.acceleration.zd", var<double>(0.03),         "Acceleration for zenith axis for pointing operations")
+        ("tracking.acceleration.az", var<double>(0.01),         "Acceleration for azimuth axis during tracking operations")
+        ("tracking.acceleration.zd", var<double>(0.01),         "Acceleration for zenith axis during tracking operations")
+        ("parking-pos.zd",           var<double>(101),          "Parking position zenith angle in sky pointing coordinates [deg]")
+        ("parking-pos.az",           var<double>(0),            "Parking position azimuth angle in sky pointing coordinates [deg]")
+        ("acceleration.max.az",      var<double>(0.03),         "Maximum allowed acceleration value for azimuth axis")
+        ("acceleration.max.zd",      var<double>(0.09),         "Maximum allowed acceleration value for zenith axis")
+        ("weather-timeout",          var<uint16_t>(300),        "Timeout [sec] for weather data (after timeout default values are used)")
         ("deviation-limit",          var<uint16_t>(90),         "Deviation limit in arcsec to get 'OnTrack'")
         ("deviation-count",          var<uint16_t>(3),          "Minimum number of reported deviation below deviation-limit to get 'OnTrack'")