diff --git a/src/UsgsAstroLsSensorModel.cpp b/src/UsgsAstroLsSensorModel.cpp
index 4a88aca7bc789e2ad094750085062390e606ba78..9e27bea59932323a06fa687388a7b2db3742d0c9 100644
--- a/src/UsgsAstroLsSensorModel.cpp
+++ b/src/UsgsAstroLsSensorModel.cpp
@@ -49,22 +49,22 @@ const std::string UsgsAstroLsSensorModel::_SENSOR_MODEL_NAME =
     "USGS_ASTRO_LINE_SCANNER_SENSOR_MODEL";
 const int UsgsAstroLsSensorModel::NUM_PARAMETERS = 16;
 const std::string UsgsAstroLsSensorModel::PARAMETER_NAME[] = {
-    "IT Pos. Bias   ",  // 0
-    "CT Pos. Bias   ",  // 1
-    "Rad Pos. Bias  ",  // 2
-    "IT Vel. Bias   ",  // 3
-    "CT Vel. Bias   ",  // 4
-    "Rad Vel. Bias  ",  // 5
-    "Omega Bias     ",  // 6
-    "Phi Bias       ",  // 7
-    "Kappa Bias     ",  // 8
-    "Omega Rate     ",  // 9
-    "Phi Rate       ",  // 10
-    "Kappa Rate     ",  // 11
-    "Omega Accl     ",  // 12
-    "Phi Accl       ",  // 13
-    "Kappa Accl     ",  // 14
-    "Focal Bias     "   // 15
+    "IT Pos. Bias   ",  //  0 - "In Track Position Bias" - a constant shift in the spacecraft's position parallel to the flight path 
+    "CT Pos. Bias   ",  //  1 - "Cross Track Position Bias" - a constant shift in the spacecraft's position perpendicular to the flight path
+    "Rad Pos. Bias  ",  //  2 - "Radial Position Bias" - a constant shift in the spacecraft's "vertical positioning," i.e. distance from the target
+    "IT Vel. Bias   ",  //  3 - "In Track Velocity Bias" - a time-dependent linear shift in the spacecraft's position parallel to the flight path
+    "CT Vel. Bias   ",  //  4 - "Cross Track Velocity Bias" - a time-dependent linear shift in the spacecraft's position perpendicular to the flight path
+    "Rad Vel. Bias  ",  //  5 - "Radial Velocity Bias" - a time-dependent linear shift in the spacecraft's "vertical positioning," i.e. distance from the target
+    "Omega Bias     ",  //  6 - The initial omega angle (analogous to "roll")
+    "Phi Bias       ",  //  7 - The initial phi angle (analogous to "pitch")
+    "Kappa Bias     ",  //  8 - The initial kappa angle (analogous to "yaw")
+    "Omega Rate     ",  //  9 - An angular rate that allows the omega angle to vary linearly with time
+    "Phi Rate       ",  // 10 - An angular rate that allows the phi angle to vary linearly with time
+    "Kappa Rate     ",  // 11 - An angular rate that allows the kappa angle to vary linearly with time
+    "Omega Accl     ",  // 12 - An angular acceleration that allows the omega angle to vary quadratically with respect to time
+    "Phi Accl       ",  // 13 - An angular acceleration that allows the phi angle to vary quadratically with respect to time
+    "Kappa Accl     ",  // 14 - An angular acceleration that allows the kappa angle to vary quadratically with respect to time
+    "Focal Bias     "   // 15 - Estimated error of the camera's focal length
 };
 
 const std::string UsgsAstroLsSensorModel::_STATE_KEYWORD[] = {
diff --git a/src/UsgsAstroPushFrameSensorModel.cpp b/src/UsgsAstroPushFrameSensorModel.cpp
index 10542000c09c8a554d2511ff8c050e7c0a269a33..0c933264786dc6bdc688d6a772410bc5c5a5b3b9 100644
--- a/src/UsgsAstroPushFrameSensorModel.cpp
+++ b/src/UsgsAstroPushFrameSensorModel.cpp
@@ -48,22 +48,22 @@ const std::string UsgsAstroPushFrameSensorModel::_SENSOR_MODEL_NAME =
     "USGS_ASTRO_PUSH_FRAME_SENSOR_MODEL";
 const int UsgsAstroPushFrameSensorModel::NUM_PARAMETERS = 16;
 const std::string UsgsAstroPushFrameSensorModel::PARAMETER_NAME[] = {
-    "IT Pos. Bias   ",  // 0
-    "CT Pos. Bias   ",  // 1
-    "Rad Pos. Bias  ",  // 2
-    "IT Vel. Bias   ",  // 3
-    "CT Vel. Bias   ",  // 4
-    "Rad Vel. Bias  ",  // 5
-    "Omega Bias     ",  // 6
-    "Phi Bias       ",  // 7
-    "Kappa Bias     ",  // 8
-    "Omega Rate     ",  // 9
-    "Phi Rate       ",  // 10
-    "Kappa Rate     ",  // 11
-    "Omega Accl     ",  // 12
-    "Phi Accl       ",  // 13
-    "Kappa Accl     ",  // 14
-    "Focal Bias     "   // 15
+    "IT Pos. Bias   ",  // 0 - "In Track Position Bias" - a constant shift in the spacecraft's position parallel to the flight path 
+    "CT Pos. Bias   ",  // 1 - "Cross Track Position Bias" - a constant shift in the spacecraft's position perpendicular to the flight path
+    "Rad Pos. Bias  ",  // 2 - "Radial Position Bias" - a constant shift in the spacecraft's "vertical positioning," i.e. distance from the target
+    "IT Vel. Bias   ",  // 3 - "In Track Velocity Bias" - a time-dependent linear shift in the spacecraft's position parallel to the flight path
+    "CT Vel. Bias   ",  // 4 - "Cross Track Velocity Bias" - a time-dependent linear shift in the spacecraft's position perpendicular to the flight path
+    "Rad Vel. Bias  ",  // 5 - "Radial Velocity Bias" - a time-dependent linear shift in the spacecraft's "vertical positioning," i.e. distance from the target
+    "Omega Bias     ",  // 6 - The initial omega angle (analogous to "roll")
+    "Phi Bias       ",  // 7 - The initial phi angle (analogous to "pitch")
+    "Kappa Bias     ",  // 8 - The initial kappa angle (analogous to "yaw")
+    "Omega Rate     ",  // 9 - An angular rate that allows the omega angle to vary linearly with time
+    "Phi Rate       ",  // 10 - An angular rate that allows the phi angle to vary linearly with time
+    "Kappa Rate     ",  // 11 - An angular rate that allows the kappa angle to vary linearly with time
+    "Omega Accl     ",  // 12 - An angular acceleration that allows the omega angle to vary quadratically with respect to time
+    "Phi Accl       ",  // 13 - An angular acceleration that allows the phi angle to vary quadratically with respect to time
+    "Kappa Accl     ",  // 14 - An angular acceleration that allows the kappa angle to vary quadratically with respect to time
+    "Focal Bias     "   // 15 - Estimated error of the camera's focal length
 };
 
 const std::string UsgsAstroPushFrameSensorModel::_STATE_KEYWORD[] = {