diff --git a/gnss_antenna_info.conf b/gnss_antenna_info.conf
index 2b5ba03..79a2aef 100644
--- a/gnss_antenna_info.conf
+++ b/gnss_antenna_info.conf
@@ -71,6 +71,14 @@
 # SIGNAL_GAIN_CORRECTION_UNC
 #   2D vectors of 1-sigma uncertainty in dBi associated with the signal
 #   gain correction values.
+#
+# The number of rows and columns could be the same for PC variation correction
+# and signal gain corrections, or could be different
+# If the former then NUMBER_OF_ROWS_ and NUMBER_OF_COLUMNS_ are specified once
+# only, if the latter then NUMBER_OF_ROWS_ and NUMBER_OF_COLUMNS_ represent
+# the number of rows/columns for PC variation correction and
+# NUMBER_OF_ROWS_SGC_ and NUMBER_OF_COLUMNS_SGC_ represent the number of
+# rows/columns for signal gain corrections
 
 ANTENNA_INFO_VECTOR_SIZE = 2
 
@@ -104,6 +112,8 @@
 
 NUMBER_OF_ROWS_1 = 4
 NUMBER_OF_COLUMNS_1 = 2
+NUMBER_OF_ROWS_SGC_1 = 3
+NUMBER_OF_COLUMNS_SGC_1 = 4
 
 PC_VARIATION_CORRECTION_1_ROW_0 = 55.66 77.88
 PC_VARIATION_CORRECTION_1_ROW_1 = 11.22 33.44
@@ -115,12 +125,10 @@
 PC_VARIATION_CORRECTION_UNC_1_ROW_2 = 2.1 2.2
 PC_VARIATION_CORRECTION_UNC_1_ROW_3 = 0.1 0.2
 
-SIGNAL_GAIN_CORRECTION_1_ROW_0 = 7.6 6.5
-SIGNAL_GAIN_CORRECTION_1_ROW_1 = 5.4 4.3
-SIGNAL_GAIN_CORRECTION_1_ROW_2 = 1.3 2.4
-SIGNAL_GAIN_CORRECTION_1_ROW_3 = 9.8 8.7
+SIGNAL_GAIN_CORRECTION_1_ROW_0 = 7.6 6.5 5.4 4.3
+SIGNAL_GAIN_CORRECTION_1_ROW_1 = 1.3 2.4 9.8 8.7
+SIGNAL_GAIN_CORRECTION_1_ROW_2 = 1.4 2.5 3.6 4.7
 
-SIGNAL_GAIN_CORRECTION_UNC_1_ROW_0 = 0.91 0.92
-SIGNAL_GAIN_CORRECTION_UNC_1_ROW_1 = 0.55 0.66
-SIGNAL_GAIN_CORRECTION_UNC_1_ROW_2 = 0.11 0.22
-SIGNAL_GAIN_CORRECTION_UNC_1_ROW_3 = 0.93 0.94
+SIGNAL_GAIN_CORRECTION_UNC_1_ROW_0 = 0.91 0.92 0.55 0.66
+SIGNAL_GAIN_CORRECTION_UNC_1_ROW_1 = 0.11 0.22 0.93 0.94
+SIGNAL_GAIN_CORRECTION_UNC_1_ROW_2 = 0.95 0.96 0.33 0.44