Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 4 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/21/2020   09:40:05   (  -0.19,-128.05) (  -1.03,-124.34)  423.38                80
 04/22/2020   22:04:41   (   0.16,-128.08) (  -0.16,-129.64)  176.74                80
 04/23/2020   21:43:17   (   0.18,-128.11) (   0.86,-125.11)  341.84                80
 04/25/2020   10:07:44   (  -0.15,-128.14) (   0.34,-130.37)  254.24                80
 04/26/2020   09:46:20   (  -0.17,-128.16) (  -0.69,-125.84)  263.47                80
 04/27/2020   22:10:56   (   0.14,-128.17) (  -0.50,-131.15)  338.53                80
 04/28/2020   21:49:31   (   0.16,-128.19) (   0.52,-126.62)  179.16                80
 04/30/2020   10:13:59   (  -0.12,-128.21) (   0.67,-131.88)  417.71                80
 05/01/2020   09:52:34   (  -0.14,-128.22) (  -0.35,-127.35)   99.27                80
 05/03/2020   21:55:45   (   0.12,-128.23) (   0.14,-128.11)   12.95                80