Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 3 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/14/2020   09:52:34   (  -0.33,-128.31) (  -0.53,-127.39)  105.32                80
 03/15/2020   22:14:30   (   0.32,-128.32) (  -0.69,-132.69)  498.41                80
 03/16/2020   21:58:26   (   0.32,-128.30) (   0.32,-128.16)   16.43                80
 03/19/2020   10:01:30   (  -0.31,-128.23) (  -0.18,-128.90)   76.35                80
 03/20/2020   09:40:05   (  -0.31,-128.21) (  -1.19,-124.37)  437.59                80
 03/21/2020   22:02:01   (   0.30,-128.20) (  -0.02,-129.67)  166.85                80
 03/22/2020   21:45:57   (   0.30,-128.19) (   0.99,-125.14)  347.30                80
 03/24/2020   10:07:44   (  -0.29,-128.13) (   0.22,-130.40)  259.25                80
 03/25/2020   09:46:20   (  -0.30,-128.10) (  -0.79,-125.87)  254.29                80
 03/26/2020   22:10:56   (   0.28,-128.09) (  -0.41,-131.17)  351.27                80