Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/24/2020   10:49:09   (  -0.02,-137.22) (   0.88,-141.30)  465.45                80
 12/25/2020   10:33:05   (  -0.02,-137.21) (  -0.13,-136.77)   50.20                80
 12/27/2020   22:33:37   (   0.01,-137.18) (  -0.08,-137.54)   41.61                80
 12/28/2020   22:17:32   (  -0.00,-137.17) (   0.93,-133.01)  473.39                80
 12/30/2020   10:36:40   (   0.00,-137.15) (   0.28,-138.28)  129.11                80
 12/31/2020   10:20:35   (   0.01,-137.13) (  -0.73,-133.75)  385.32                80
 01/01/2021   22:39:52   (  -0.01,-137.09) (  -0.42,-139.06)  223.57                80
 01/02/2021   22:23:47   (  -0.01,-137.07) (   0.54,-134.52)  290.50                80
 01/04/2021   10:42:55   (   0.01,-137.05) (   0.62,-139.80)  313.17                80
 01/05/2021   10:26:51   (   0.01,-137.02) (  -0.40,-135.27)  200.49                80
 01/06/2021   22:46:07   (  -0.01,-136.98) (  -0.81,-140.57)  409.47                80