Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2020   10:26:49   (  -0.01,-137.23) (  -0.48,-135.26)  225.37                80
 12/21/2020   22:46:05   (   0.02,-137.22) (  -0.75,-140.56)  380.61                80
 12/22/2020   22:30:01   (   0.02,-137.22) (   0.26,-136.03)  135.42                80
 12/24/2020   10:49:09   (  -0.02,-137.22) (   0.89,-141.30)  465.38                80
 12/25/2020   10:33:05   (  -0.01,-137.21) (  -0.12,-136.77)   50.29                80
 12/27/2020   22:33:37   (   0.00,-137.18) (  -0.09,-137.54)   41.43                80
 12/28/2020   22:17:32   (  -0.01,-137.17) (   0.93,-133.01)  473.56                80
 12/30/2020   10:36:39   (   0.01,-137.15) (   0.29,-138.28)  129.01                80
 12/31/2020   10:20:35   (   0.01,-137.13) (  -0.72,-133.75)  385.39                80
 01/01/2021   22:39:52   (  -0.01,-137.10) (  -0.42,-139.06)  223.43                80
 01/02/2021   22:23:48   (  -0.01,-137.08) (   0.59,-134.53)  290.59                80