PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-21:42:40
G02     199.5          16.7               23.4 +/-    2.61      55.8 +/-    2.61  0.040 / 0.070
G06     174.7          46.4               16.1 +/-    1.17      21.3 +/-    1.17  0.050 / 0.070
G13     229.7          16.4               18.7 +/-    2.76      44.8 +/-    2.76  0.080 / 0.180
G17     17.2           63.0               11.5 +/-    0.61      12.8 +/-    0.61  0.080 / 0.150
G19     307.0          71.7               12.0 +/-    0.54      12.6 +/-    0.54  0.080 / 0.230
G24     312.1          27.1                8.4 +/-    1.44      15.7 +/-    1.44  0.080 / 0.220
G28     78.8           45.8               11.8 +/-    0.51      15.7 +/-    0.51  0.040 / 0.040
G30     155.9          17.4               21.8 +/-    2.42      51.3 +/-    2.42  0.030 / 0.040