Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 2 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/24/2021   09:46:12   (  -0.17,-128.11) (  -0.66,-125.83)  259.23                80
 02/25/2021   22:08:08   (   0.16,-128.18) (  -0.50,-131.14)  337.64                80
 02/26/2021   21:52:04   (   0.17,-128.20) (   0.53,-126.61)  181.26                80
 02/28/2021   10:13:51   (  -0.16,-128.20) (   0.67,-131.88)  418.89                80
 03/01/2021   09:52:26   (  -0.16,-128.22) (  -0.36,-127.35)   99.14                80
 03/02/2021   22:14:23   (   0.15,-128.27) (  -0.80,-132.66)  499.37                80
 03/03/2021   21:58:17   (   0.16,-128.29) (   0.17,-128.12)   19.11                80
 03/06/2021   10:01:20   (  -0.15,-128.29) (  -0.00,-128.85)   64.16                80
 03/07/2021   09:39:56   (  -0.15,-128.30) (  -1.04,-124.33)  453.00                80
 03/08/2021   22:01:52   (   0.14,-128.34) (  -0.12,-129.63)  147.15                80
 03/09/2021   21:45:46   (   0.14,-128.35) (   0.85,-125.09)  370.46                80