PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-18:57:50
G01     80.4           32.8               10.0 +/-    0.67      16.6 +/-    0.67  0.030 / 0.030
G07     132.0          32.3               13.2 +/-    0.61      22.1 +/-    0.61  0.030 / 0.030
G11     59.4           35.7               11.4 +/-    1.28      17.9 +/-    1.28  0.050 / 0.110
G13     284.5          38.5               16.2 +/-    2.00      24.1 +/-    2.00  0.060 / 0.080
G15     308.9          13.4               10.4 +/-    2.27      27.0 +/-    2.27  0.040 / 0.050
G17     220.3          61.3               14.2 +/-    1.34      15.9 +/-    1.34  0.040 / 0.040
G18     54.6           20.8               10.6 +/-    3.58      22.8 +/-    3.58  0.060 / 0.100
G19     217.8          34.6               14.8 +/-    1.50      23.6 +/-    1.50  0.070 / 0.100
G28     353.8          61.6               10.8 +/-    0.74      12.1 +/-    0.74  0.100 / 0.250
G30     124.9          67.5               12.3 +/-    0.31      13.2 +/-    0.31  0.120 / 0.160