Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 3 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/06/2021   10:01:21   (  -0.14,-128.31) (  -0.04,-128.86)   62.69                80
 03/07/2021   09:39:55   (  -0.15,-128.31) (  -1.01,-124.32)  454.72                80
 03/08/2021   22:01:51   (   0.13,-128.37) (  -0.15,-129.63)  142.79                80
 03/09/2021   21:45:47   (   0.13,-128.39) (   0.89,-125.10)  375.08                80
 03/11/2021   10:07:34   (  -0.12,-128.37) (   0.31,-130.36)  227.19                80
 03/12/2021   09:46:09   (  -0.13,-128.37) (  -0.67,-125.82)  290.02                80
 03/13/2021   22:08:05   (   0.12,-128.42) (  -0.49,-131.13)  308.62                80
 03/14/2021   21:52:01   (   0.12,-128.44) (   0.55,-126.61)  209.11                80
 03/16/2021   10:13:48   (  -0.11,-128.42) (   0.64,-131.87)  392.51                80
 03/17/2021   09:52:22   (  -0.12,-128.43) (  -0.34,-127.33)  124.27                80
 03/18/2021   22:14:19   (   0.10,-128.46) (  -0.81,-132.64)  476.21                80
 03/19/2021   21:58:13   (   0.11,-128.46) (   0.17,-128.10)   40.91                80