Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 5 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/03/2021   10:13:28   (   0.05,-127.76) (   0.91,-131.73)  451.18                80
 05/04/2021   09:52:03   (   0.04,-127.80) (  -0.06,-127.19)   68.74                80
 05/06/2021   21:55:18   (  -0.05,-127.85) (  -0.06,-127.98)   14.49                80
 05/09/2021   10:01:04   (   0.05,-128.00) (   0.19,-128.73)   82.86                80
 05/10/2021   09:39:40   (   0.04,-128.04) (  -0.84,-124.21)  436.69                80
 05/11/2021   22:01:38   (  -0.04,-128.04) (  -0.37,-129.51)  168.28                80
 05/12/2021   21:45:34   (  -0.04,-128.07) (   0.67,-124.99)  351.56                80
 05/14/2021   10:07:23   (   0.04,-128.18) (   0.49,-130.27)  237.53                80
 05/15/2021   09:46:00   (   0.03,-128.21) (  -0.55,-125.74)  281.25                80