Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2021 12 18.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-19) NOAA-19 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/22/2021   18:44:21   (  77.39,-124.72) 12/22/2021   18:45:32  (  77.45,-123.22)   36.76                71
 12/22/2021   19:35:21   ( -77.58,  43.46) 12/22/2021   19:36:19  ( -77.57,  43.56)    2.94                58
 12/22/2021   20:26:16   (  77.60,-149.17) 12/22/2021   20:27:05  (  77.58,-149.22)    2.03                49
 12/22/2021   21:17:21   ( -77.59,  17.99) 12/22/2021   21:17:50  ( -77.62,  17.95)    3.35                29
 12/22/2021   22:08:16   (  77.61,-174.64) 12/22/2021   22:08:35  (  77.59,-174.63)    1.63                19
 12/22/2021   22:59:21   ( -77.59,  -7.48) 12/22/2021   22:59:20  ( -77.62,  -7.46)    3.49                 1
 12/22/2021   23:50:16   (  77.61, 159.90) 12/22/2021   23:50:05  (  77.60, 159.96)    2.15                11
 12/23/2021   00:41:20   ( -77.64, -32.74) 12/23/2021   00:40:50  ( -77.63, -32.87)    3.11                30
 12/23/2021   01:32:16   (  77.62, 134.43) 12/23/2021   01:31:35  (  77.61, 134.55)    3.17                41
 12/23/2021   02:23:20   ( -77.64, -58.21) 12/23/2021   02:22:20  ( -77.64, -58.28)    1.74                60
 12/23/2021   03:14:16   (  77.62, 108.96) 12/23/2021   03:13:06  (  77.66, 108.94)    3.62                70