PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-15:12:50
G01     81.9           33.1               13.4 +/-    0.81      22.0 +/-    0.81  0.030 / 0.040
G07     131.3          39.5               14.5 +/-    1.00      21.2 +/-    1.00  0.040 / 0.040
G11     60.9           36.1               12.3 +/-    0.32      19.2 +/-    0.32  0.070 / 0.120
G13     286.1          37.6               14.1 +/-    1.27      21.4 +/-    1.27  0.060 / 0.100
G15     312.2          11.3               10.2 +/-    1.75      27.7 +/-    1.75  0.070 / 0.120
G17     220.6          60.2               15.7 +/-    0.67      17.7 +/-    0.67  0.060 / 0.120
G18     56.8           21.9               10.9 +/-    1.01      22.8 +/-    1.01  0.050 / 0.080
G19     218.2          30.7               15.4 +/-    1.52      26.6 +/-    1.52  0.050 / 0.070
G28     2.3            61.1               14.3 +/-    0.77      16.1 +/-    0.77  0.040 / 0.070
G30     121.7          71.4               15.4 +/-    0.74      16.2 +/-    0.74  0.040 / 0.060