Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2021 12 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/21/2021   20:21:57   (  -0.02,-104.19) (  -0.09,-104.41)   25.89                80
 12/22/2021   20:05:52   (  -0.03,-104.20) (   0.94, -99.88)  491.81                80
 12/24/2021   08:27:39   (   0.01,-104.52) (   0.14,-105.17)   73.21                80
 12/25/2021   08:06:13   (   0.02,-104.52) (  -0.84,-100.62)  443.49                80
 12/26/2021   20:28:07   (   0.00,-104.19) (  -0.36,-105.92)  196.26                80
 12/27/2021   20:12:01   (  -0.01,-104.20) (   0.62,-101.38)  321.31                80
 12/29/2021   08:33:48   (  -0.01,-104.54) (   0.47,-106.66)  242.10                80
 12/30/2021   08:12:21   (   0.00,-104.53) (  -0.51,-102.12)  274.62                80
 12/31/2021   20:34:15   (   0.01,-104.19) (  -0.74,-107.40)  366.84                80
 01/01/2022   20:18:09   (  -0.00,-104.19) (   0.31,-102.87)  150.24                80