Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 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)
 12/25/2019   22:36:25   (  -0.02,-137.19) (  -0.13,-137.55)   41.41                80
 12/26/2019   22:15:01   (  -0.02,-137.18) (   0.93,-133.02)  474.28                80
 12/28/2019   10:39:27   (   0.02,-137.16) (   0.26,-138.29)  127.72                80
 12/29/2019   10:18:02   (   0.02,-137.15) (  -0.75,-133.75)  387.60                80
 12/30/2019   22:42:37   (  -0.02,-137.14) (  -0.44,-139.05)  218.17                80
 12/31/2019   22:21:11   (  -0.02,-137.12) (   0.56,-134.52)  296.99                80
 01/02/2020   10:45:38   (   0.02,-137.10) (   0.63,-139.78)  305.54                80
 01/03/2020   10:24:12   (   0.02,-137.08) (  -0.37,-135.24)  209.33                80
 01/04/2020   22:48:47   (  -0.03,-137.06) (  -0.81,-140.55)  397.22                80
 01/05/2020   22:27:22   (  -0.02,-137.04) (   0.20,-136.01)  117.27                80
 01/07/2020   10:51:48   (   0.04,-137.01) (   1.00,-141.27)  486.47                80