Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 2 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/16/2021   10:39:23   (  -0.03,-137.22) (   0.22,-138.32)  126.42                80
 02/17/2021   10:17:58   (  -0.03,-137.21) (  -0.81,-133.80)  389.53                80
 02/18/2021   22:39:55   (   0.03,-137.21) (  -0.36,-139.10)  215.56                80
 02/19/2021   22:23:49   (   0.03,-137.20) (   0.61,-134.56)  300.06                80
 02/21/2021   10:45:36   (  -0.02,-137.18) (   0.60,-139.83)  302.38                80
 02/22/2021   10:24:12   (  -0.02,-137.16) (  -0.43,-135.30)  212.75                80
 02/23/2021   22:46:07   (  -0.00,-137.14) (  -0.79,-140.59)  393.60                80
 02/24/2021   22:30:03   (  -0.01,-137.13) (   0.24,-136.06)  121.05                80
 02/26/2021   10:51:50   (   0.01,-137.10) (   0.97,-141.33)  482.72                80
 02/27/2021   10:30:26   (   0.00,-137.07) (  -0.06,-136.80)   31.45                80