Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 3 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/29/2021   22:07:59   (   0.06,-128.36) (  -0.57,-131.09)  311.88                80
 03/30/2021   21:51:54   (   0.06,-128.35) (   0.47,-126.56)  203.68                80
 04/01/2021   10:13:41   (  -0.05,-128.32) (   0.75,-131.82)  399.70                80
 04/02/2021   09:52:16   (  -0.06,-128.30) (  -0.29,-127.29)  114.65                80
 04/03/2021   22:14:11   (   0.04,-128.28) (  -0.92,-132.59)  491.01                80
 04/04/2021   21:58:07   (   0.05,-128.26) (   0.12,-128.06)   24.06                80
 04/07/2021   10:01:08   (  -0.04,-128.21) (   0.11,-128.78)   65.01                80
 04/08/2021   09:39:43   (  -0.04,-128.19) (  -0.94,-124.25)  449.07                80
 04/09/2021   22:01:39   (   0.03,-128.17) (  -0.28,-129.55)  157.39                80
 04/10/2021   21:45:33   (   0.04,-128.15) (   0.71,-125.01)  357.35                80