Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/29/2019   10:24:59   (  -0.02,-137.21) (  -0.44,-135.29)  217.91                80
 09/30/2019   22:46:55   (   0.02,-137.20) (  -0.72,-140.60)  387.67                80
 10/01/2019   22:28:10   (   0.02,-137.20) (   0.25,-136.07)  128.53                80
 10/03/2019   10:52:37   (  -0.00,-137.20) (   0.95,-141.34)  471.95                80
 10/04/2019   10:31:13   (  -0.00,-137.19) (  -0.08,-136.81)   43.66                80
 10/06/2019   22:37:04   (   0.00,-137.17) (  -0.10,-137.58)   47.69                80
 10/07/2019   22:15:39   (   0.01,-137.16) (   0.93,-133.06)  467.48                80
 10/09/2019   10:40:06   (  -0.00,-137.15) (   0.27,-138.33)  134.41                80
 10/10/2019   10:18:42   (  -0.00,-137.14) (  -0.77,-133.80)  380.58                80
 10/11/2019   22:43:17   (  -0.00,-137.11) (  -0.45,-139.10)  226.69                80
 10/12/2019   22:21:52   (  -0.01,-137.10) (   0.53,-134.56)  288.25                80