Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 2 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/19/2021   22:23:50   (   0.04,-137.20) (   0.66,-134.57)  299.70                80
 02/21/2021   10:45:37   (  -0.04,-137.18) (   0.54,-139.84)  302.42                80
 02/22/2021   10:24:12   (  -0.03,-137.17) (  -0.43,-135.30)  212.66                80
 02/23/2021   22:46:08   (   0.02,-137.14) (  -0.74,-140.60)  394.19                80
 02/24/2021   22:30:03   (   0.02,-137.13) (   0.23,-136.06)  120.66                80
 02/26/2021   10:51:50   (  -0.00,-137.10) (   0.97,-141.33)  482.43                80
 02/27/2021   10:30:25   (  -0.00,-137.08) (  -0.06,-136.80)   31.81                80
 03/01/2021   22:33:36   (   0.01,-137.02) (  -0.13,-137.57)   62.43                80
 03/02/2021   22:17:32   (   0.01,-137.00) (   0.91,-133.04)  451.35                80
 03/04/2021   10:39:19   (  -0.01,-136.96) (   0.29,-138.30)  153.27                80