PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-15:12:30
G01     83.6           32.6                8.9 +/-    0.71      14.8 +/-    0.71  0.030 / 0.040
G07     130.1          37.3               11.7 +/-    1.38      17.8 +/-    1.38  0.020 / 0.040
G11     61.3           34.5                7.0 +/-    1.29      11.2 +/-    1.29  0.040 / 0.090
G13     290.4          36.2               10.8 +/-    1.05      16.7 +/-    1.05  0.050 / 0.090
G15     314.4          10.2              -10.1 +/-   11.67     -28.0 +/-   11.67  0.040 / 0.040
G17     218.9          61.5               14.5 +/-    0.56      16.3 +/-    0.56  0.030 / 0.050
G19     217.1          33.8              -63.3 +/-   23.04    -102.7 +/-   23.04  0.050 / 0.100
G28     359.5          61.1                7.4 +/-    1.03       8.3 +/-    1.03  0.060 / 0.150
G30     114.4          74.3               10.9 +/-    0.64      11.2 +/-    0.64  0.080 / 0.120