Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2022 12 31.  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)
 01/01/2023   06:45:16   ( -70.26,-105.11) 01/01/2023   06:46:28  ( -70.24,-104.88)    8.71                72
 01/01/2023   07:35:59   (  70.09,  62.46) 01/01/2023   07:35:56  (  70.08,  62.53)    2.84                 3
 01/01/2023   08:26:40   ( -69.95,-130.01) 01/01/2023   08:25:26  ( -69.97,-129.99)    2.36                74
 01/03/2023   23:02:08   ( -70.15,  10.83) 01/03/2023   23:02:58  ( -70.16,  10.87)    1.77                50
 01/03/2023   23:52:52   (  70.04, 178.31) 01/03/2023   23:52:25  (  70.05, 178.36)    2.29                27
 01/04/2023   00:43:17   ( -69.05, -12.94) 01/04/2023   00:42:10  ( -69.12, -15.27)   92.66                67
 01/06/2023   14:28:38   (  71.14, -42.33) 01/06/2023   14:29:43  (  71.03, -39.58)   99.90                65
 01/06/2023   15:19:02   ( -70.10, 126.67) 01/06/2023   15:19:28  ( -70.10, 126.68)    0.33                26
 01/06/2023   16:09:46   (  69.99, -65.85) 01/06/2023   16:08:55  (  69.99, -65.84)    0.58                51
 01/09/2023   06:45:15   (  70.21,  74.95) 01/09/2023   06:46:27  (  70.18,  75.04)    4.04                72
 01/09/2023   07:35:56   ( -70.06,-117.50) 01/09/2023   07:35:57  ( -70.08,-117.47)    2.90                 1
 01/09/2023   08:26:38   (  69.84,  50.13) 01/09/2023   08:25:26  (  69.86,  49.85)   10.79                72
 01/11/2023   23:02:08   (  70.12,-169.15) 01/11/2023   23:02:56  (  70.14,-169.15)    1.96                48
 01/11/2023   23:52:50   ( -70.02,  -1.68) 01/11/2023   23:52:26  ( -70.04,  -1.66)    2.14                24