Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 7 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/17/2021   10:05:32   (  -0.07,-127.75) (   0.52,-130.40)  301.85                80
 07/18/2021   09:49:27   (  -0.07,-127.71) (  -0.46,-125.86)  210.15                80
 07/19/2021   22:08:45   (   0.09,-127.56) (  -0.73,-131.17)  411.27                80
 07/20/2021   21:52:40   (   0.08,-127.52) (   0.25,-126.63)  100.35                80
 07/22/2021   10:11:49   (  -0.11,-127.53) (   0.90,-131.91)  499.61                80
 07/23/2021   09:55:46   (  -0.10,-127.48) (  -0.14,-127.39)   11.75                80
 07/25/2021   21:56:19   (   0.11,-127.28) (  -0.07,-128.16)   99.46                80
 07/26/2021   21:40:14   (   0.10,-127.23) (   0.91,-123.62)  411.94                80
 07/28/2021   09:59:24   (  -0.12,-127.25) (   0.24,-128.90)  187.97                80
 07/29/2021   09:43:19   (  -0.11,-127.20) (  -0.74,-124.36)  323.30                80