PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-19:42:50
G01     78.2           32.9               10.5 +/-    1.11      17.3 +/-    1.11  0.030 / 0.030
G07     133.2          30.6               11.4 +/-    1.08      19.7 +/-    1.08  0.030 / 0.030
G11     57.7           34.5               10.3 +/-    1.26      16.4 +/-    1.26  0.070 / 0.100
G13     282.1          38.6                9.9 +/-    2.18      14.7 +/-    2.18  0.060 / 0.090
G15     307.4          14.0                7.8 +/-    1.59      19.8 +/-    1.59  0.040 / 0.040
G17     222.4          63.5               14.0 +/-    1.15      15.4 +/-    1.15  0.050 / 0.050
G18     52.7           19.9                9.0 +/-    2.04      19.7 +/-    2.04  0.110 / 0.280
G19     219.0          36.3               14.4 +/-    1.39      22.3 +/-    1.39  0.100 / 0.200
G28     357.9          61.4               10.6 +/-    0.66      11.9 +/-    0.66  0.080 / 0.120
G30     127.6          66.2               12.7 +/-    0.54      13.8 +/-    0.54  0.060 / 0.140