PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-19:12:50
G01     94.8           30.1               11.0 +/-    1.14      19.2 +/-    1.14  0.030 / 0.020
G07     122.5          42.8               11.3 +/-    1.23      15.7 +/-    1.23  0.030 / 0.020
G08     41.8           10.7                8.8 +/-    2.76      24.2 +/-    2.76  0.040 / 0.070
G11     72.4           41.2               10.1 +/-    1.12      14.5 +/-    1.12  0.030 / 0.070
G13     298.9          35.3               10.9 +/-    2.03      17.1 +/-    2.03  0.050 / 0.040
G17     210.4          49.5               12.9 +/-    0.42      16.4 +/-    0.42  0.040 / 0.050
G18     66.3           23.7                8.8 +/-    1.16      17.7 +/-    1.16  0.090 / 0.160
G19     212.0          23.3               12.4 +/-    1.95      25.1 +/-    1.95  0.090 / 0.190
G28     330.2          61.2                8.9 +/-    0.80      10.0 +/-    0.80  0.080 / 0.160
G30     91.8           77.2               10.8 +/-    0.44      11.0 +/-    0.44  0.080 / 0.150