Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NPP
TLE Epoch: 2022 11 30.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/05/2022   19:12:19   ( -79.32,  39.50) 12/05/2022   19:11:08  ( -79.32,  39.47)    0.64                71
 12/05/2022   20:03:15   (  79.70,-156.31) 12/05/2022   20:02:05  (  79.70,-156.42)    2.17                70
 12/05/2022   20:53:03   ( -78.34,  20.58) 12/05/2022   20:52:11  ( -78.34,  20.58)    0.10                52
 12/05/2022   21:44:03   (  78.93,-175.68) 12/05/2022   21:43:12  (  78.93,-175.76)    1.65                51
 12/05/2022   22:33:35   ( -76.72,   2.80) 12/05/2022   22:33:02  ( -76.72,   2.81)    0.19                33
 12/05/2022   23:24:42   (  77.68, 166.00) 12/05/2022   23:24:10  (  77.69, 165.94)    1.36                32
 12/06/2022   00:13:49   ( -74.06, -14.31) 12/06/2022   00:13:35  ( -74.06, -14.31)    0.02                14
 12/06/2022   01:05:05   (  75.56, 148.86) 12/06/2022   01:04:52  (  75.56, 148.81)    1.42                13
 12/06/2022   01:53:49   ( -70.46, -32.49) 12/06/2022   01:53:54  ( -70.47, -32.52)    1.07                 5
 12/06/2022   02:45:09   (  72.27, 131.64) 12/06/2022   02:45:15  (  72.28, 131.58)    2.09                 6
 12/06/2022   03:27:44   ( -45.99, -39.64) 12/06/2022   03:28:06  ( -45.99, -39.63)    0.93                22
 12/06/2022   04:18:17   (  45.25, 127.95) 12/06/2022   04:18:41  (  45.25, 127.96)    0.87                24
 12/06/2022   05:32:57   ( -47.63, 127.72) 12/06/2022   05:33:42  ( -47.61, 127.74)    3.27                45
 12/06/2022   06:23:30   (  47.90, -64.83) 12/06/2022   06:24:19  (  47.89, -64.82)    1.24                49
 12/06/2022   07:09:51   ( -62.18, 110.66) 12/06/2022   07:10:55  ( -62.17, 110.64)    1.30                64