Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/14/2021   22:24:44   (  -0.05,-137.20) (   0.53,-134.66)  289.38                80
 08/16/2021   10:46:32   (   0.04,-137.20) (   0.65,-139.93)  311.45                80
 08/17/2021   10:25:08   (   0.04,-137.19) (  -0.34,-135.39)  204.05                80
 08/18/2021   22:47:05   (  -0.03,-137.17) (  -0.85,-140.70)  402.69                80
 08/19/2021   22:31:01   (  -0.03,-137.16) (   0.20,-136.18)  112.48                80
 08/21/2021   10:50:10   (   0.01,-137.15) (   0.99,-141.45)  489.76                80
 08/22/2021   10:34:06   (   0.00,-137.14) (  -0.06,-136.93)   25.33                80
 08/24/2021   22:34:39   (  -0.00,-137.11) (  -0.13,-137.70)   66.61                80
 08/25/2021   22:18:35   (  -0.01,-137.10) (   0.86,-133.16)  448.49                80
 08/27/2021   10:37:43   (   0.01,-137.09) (   0.32,-138.43)  153.78                80