Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 1 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/17/2021   10:01:16   (   0.28,-127.98) (   0.43,-128.75)   87.70                80
 01/18/2021   09:39:51   (   0.25,-127.96) (  -0.58,-124.22)  425.78                80
 01/19/2021   22:04:27   (  -0.30,-127.97) (  -0.61,-129.52)  176.17                80
 01/20/2021   21:43:03   (  -0.27,-127.95) (   0.41,-124.99)  337.08                80
 01/22/2021   10:07:29   (   0.32,-127.86) (   0.86,-130.24)  272.27                80
 01/23/2021   09:46:05   (   0.30,-127.83) (  -0.16,-125.72)  240.68                80
 01/24/2021   22:10:41   (  -0.34,-127.84) (  -1.03,-131.02)  362.24                80
 01/25/2021   21:49:17   (  -0.32,-127.81) (  -0.01,-126.49)  150.29                80
 01/27/2021   10:13:43   (   0.36,-127.70) (   1.28,-131.74)  460.47                80
 01/28/2021   09:52:18   (   0.34,-127.67) (   0.26,-127.21)   51.69                80