Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 10 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/07/2021   22:09:18   (  -0.29,-127.93) (  -1.01,-131.15)  367.88                80
 10/08/2021   21:53:13   (  -0.31,-127.96) (   0.00,-126.62)  152.40                80
 10/10/2021   10:12:21   (   0.28,-128.02) (   1.16,-131.89)  441.62                80
 10/11/2021   09:56:17   (   0.29,-128.05) (   0.15,-127.36)   78.04                80
 10/13/2021   21:56:50   (  -0.27,-128.09) (  -0.28,-128.14)    5.40                80
 10/16/2021   09:59:54   (   0.25,-128.17) (   0.43,-128.88)   80.85                80
 10/17/2021   09:43:49   (   0.27,-128.20) (  -0.58,-124.35)  438.66                80
 10/18/2021   22:03:06   (  -0.24,-128.22) (  -0.55,-129.66)  164.21                80
 10/19/2021   21:47:02   (  -0.25,-128.24) (   0.47,-125.13)  355.30                80