Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 2 14.  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)
 02/15/2023   15:18:41   (  70.09, -53.35) 02/15/2023   15:19:27  (  70.08, -53.41)    2.42                46
 02/15/2023   16:09:23   ( -70.00, 114.11) 02/15/2023   16:08:56  ( -70.02, 114.14)    2.85                27
 02/18/2023   06:45:07   ( -70.94,-106.26) 02/18/2023   06:46:14  ( -70.84,-104.05)   81.19                67
 02/18/2023   07:35:37   (  70.09,  62.40) 02/18/2023   07:35:53  (  70.08,  62.47)    3.28                16
 02/18/2023   08:26:18   ( -69.95,-130.06) 02/18/2023   08:25:23  ( -69.96,-130.05)    1.60                55
 02/20/2023   23:01:47   ( -70.12,  10.81) 02/20/2023   23:02:52  ( -70.12,  10.79)    0.91                65
 02/20/2023   23:52:31   (  70.01, 178.29) 02/20/2023   23:52:19  (  70.01, 178.28)    0.51                12
 02/21/2023   00:43:06   ( -69.55, -13.70) 02/21/2023   00:41:55  ( -69.57, -14.69)   38.58                71
 02/23/2023   15:18:40   ( -70.05, 126.68) 02/23/2023   15:19:16  ( -70.07, 126.61)    3.18                36
 02/23/2023   16:09:24   (  69.95, -65.85) 02/23/2023   16:08:43  (  69.95, -65.91)    2.38                41
 02/26/2023   06:44:56   (  70.32,  74.73) 02/26/2023   06:46:08  (  70.23,  75.10)   17.29                72
 02/26/2023   07:35:35   ( -70.05,-117.56) 02/26/2023   07:35:39  ( -70.06,-117.49)    2.47                 4
 02/26/2023   08:26:19   (  69.95,  49.91) 02/26/2023   08:25:06  (  69.95,  49.99)    2.93                73