Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 9 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/11/2021   21:59:19   (  -0.42,-128.11) (  -0.40,-128.13)    2.92                80
 09/14/2021   09:59:43   (   0.41,-128.10) (   0.57,-128.87)   87.50                80
 09/15/2021   09:43:38   (   0.41,-128.07) (  -0.43,-124.33)  425.91                80
 09/16/2021   22:02:56   (  -0.39,-127.97) (  -0.74,-129.64)  189.49                80
 09/17/2021   21:46:51   (  -0.39,-127.94) (   0.26,-125.11)  323.77                80
 09/19/2021   10:05:59   (   0.38,-127.95) (   0.91,-130.38)  276.33                80
 09/20/2021   09:49:55   (   0.38,-127.92) (  -0.09,-125.84)  237.19                80
 09/21/2021   22:09:11   (  -0.37,-127.83) (  -1.13,-131.14)  377.74                80
 09/22/2021   21:53:07   (  -0.38,-127.80) (  -0.13,-126.61)  135.55                80