Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/11/2021   22:34:56   (  -0.04,-137.18) (  -0.14,-137.69)   57.28                80
 10/12/2021   22:18:51   (  -0.04,-137.17) (   0.88,-133.16)  457.94                80
 10/14/2021   10:37:59   (   0.03,-137.16) (   0.29,-138.43)  144.06                80
 10/15/2021   10:21:55   (   0.02,-137.15) (  -0.73,-133.90)  371.00                80
 10/16/2021   22:41:11   (  -0.02,-137.12) (  -0.47,-139.19)  236.19                80
 10/17/2021   22:25:07   (  -0.02,-137.11) (   0.55,-134.66)  278.91                80
 10/19/2021   10:44:14   (   0.02,-137.09) (   0.68,-139.92)  323.20                80
 10/20/2021   10:28:10   (   0.02,-137.08) (  -0.34,-135.39)  191.70                80
 10/21/2021   22:47:26   (  -0.02,-137.04) (  -0.85,-140.69)  416.06                80
 10/22/2021   22:31:21   (  -0.02,-137.02) (   0.17,-136.16)   98.39                80