Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 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)
 03/20/2021   10:39:16   (  -0.05,-137.20) (   0.22,-138.30)  126.06                80
 03/21/2021   10:17:52   (  -0.04,-137.19) (  -0.82,-133.77)  389.69                80
 03/22/2021   22:39:47   (   0.04,-137.17) (  -0.40,-139.07)  216.19                80
 03/23/2021   22:23:43   (   0.03,-137.16) (   0.64,-134.54)  299.22                80
 03/25/2021   10:45:29   (  -0.02,-137.15) (   0.60,-139.80)  302.82                80
 03/26/2021   10:24:04   (  -0.02,-137.13) (  -0.44,-135.27)  212.19                80
 03/27/2021   22:46:00   (   0.02,-137.10) (  -0.77,-140.56)  394.89                80
 03/28/2021   22:29:55   (   0.02,-137.09) (   0.27,-136.04)  119.78                80
 03/30/2021   10:51:43   (  -0.02,-137.06) (   0.90,-141.31)  483.37                80
 03/31/2021   10:30:17   (  -0.02,-137.04) (  -0.08,-136.77)   30.71                80
 04/02/2021   22:33:28   (   0.02,-136.97) (  -0.09,-137.54)   64.33                80