Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 4 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/02/2021   09:52:16   (  -0.05,-128.29) (  -0.26,-127.29)  114.35                80
 04/03/2021   22:14:11   (   0.04,-128.28) (  -0.96,-132.58)  490.38                80
 04/04/2021   21:58:06   (   0.04,-128.27) (   0.09,-128.05)   24.49                80
 04/07/2021   10:01:08   (  -0.03,-128.21) (   0.08,-128.79)   65.19                80
 04/08/2021   09:39:43   (  -0.04,-128.19) (  -0.91,-124.25)  448.88                80
 04/09/2021   22:01:38   (   0.03,-128.17) (  -0.31,-129.54)  156.69                80
 04/10/2021   21:45:34   (   0.03,-128.16) (   0.74,-125.02)  358.09                80
 04/12/2021   10:07:20   (  -0.02,-128.12) (   0.47,-130.27)  245.51                80
 04/13/2021   09:45:55   (  -0.03,-128.10) (  -0.58,-125.75)  268.18                80
 04/14/2021   22:07:51   (   0.02,-128.06) (  -0.63,-131.04)  339.45                80
 04/15/2021   21:51:45   (   0.03,-128.04) (   0.36,-126.51)  174.66                80