PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-22:28:10
G02     200.2          22.6               12.4 +/-    2.41      25.6 +/-    2.41  0.080 / 0.130
G06     173.5          52.8               10.7 +/-    0.80      13.1 +/-    0.80  0.090 / 0.100
G13     225.3          12.4                9.8 +/-   16.27      25.8 +/-   16.27  0.040 / 0.090
G17     24.6           58.0               10.6 +/-    0.70      12.2 +/-    0.70  0.040 / 0.070
G19     327.5          70.9                9.5 +/-    0.44      10.0 +/-    0.44  0.080 / 0.250
G24     308.1          31.6                9.2 +/-    2.20      15.7 +/-    2.20  0.220 / 0.300
G28     86.3           42.4               10.8 +/-    1.13      15.1 +/-    1.13  0.030 / 0.030
G30     156.8          12.0               11.1 +/-    4.02      29.6 +/-    4.02  0.040 / 0.040