Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 24.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 01/25/2023   06:45:10   (  70.32,  74.75) 01/25/2023   06:46:22  (  70.25,  75.13)   16.24                72
 01/25/2023   07:35:49   ( -70.08,-117.55) 01/25/2023   07:35:53  ( -70.08,-117.48)    2.96                 4
 01/25/2023   08:26:32   (  69.91,  50.01) 01/25/2023   08:25:21  (  69.93,  49.95)    3.40                71
 01/27/2023   23:01:58   (  70.11,-169.14) 01/27/2023   23:02:55  (  70.12,-169.20)    2.44                57
 01/27/2023   23:52:40   ( -70.02,  -1.69) 01/27/2023   23:52:25  ( -70.01,  -1.72)    1.79                15
 01/28/2023   00:43:11   (  69.21, 166.79) 01/28/2023   00:42:03  (  69.29, 164.96)   72.98                68
 01/30/2023   15:18:51   (  70.11, -53.38) 01/30/2023   15:19:26  (  70.10, -53.35)    1.63                35
 01/30/2023   16:09:32   ( -69.97, 114.16) 01/30/2023   16:08:56  ( -70.00, 114.14)    3.23                36
 02/02/2023   06:45:11   ( -70.82,-106.03) 02/02/2023   06:46:20  ( -70.71,-104.23)   66.93                69
 02/02/2023   07:35:43   (  70.08,  62.45) 02/02/2023   07:35:57  (  70.05,  62.45)    3.20                14
 02/02/2023   08:26:24   ( -69.93,-130.01) 02/02/2023   08:25:27  ( -69.95,-130.06)    2.39                57
 02/04/2023   23:01:50   ( -70.11,  10.87) 02/04/2023   23:03:00  ( -70.13,  10.79)    3.28                70
 02/04/2023   23:52:34   (  70.01, 178.33) 02/04/2023   23:52:27  (  70.01, 178.28)    2.24                 7
 02/05/2023   00:43:12   ( -69.70, -13.89) 02/05/2023   00:42:00  ( -69.75, -14.46)   22.68                72