Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 2 25.  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)
 02/26/2023   06:45:01   (  70.55,  74.36) 02/26/2023   06:46:11  (  70.45,  75.40)   40.06                70
 02/26/2023   07:35:35   ( -70.04,-117.53) 02/26/2023   07:35:46  ( -70.07,-117.53)    3.43                11
 02/26/2023   08:26:19   (  69.92,  49.95) 02/26/2023   08:25:14  (  69.91,  49.89)    2.61                65
 02/28/2023   23:01:48   (  70.12,-169.22) 02/28/2023   23:02:44  (  70.14,-169.17)    3.12                56
 02/28/2023   23:52:30   ( -70.03,  -1.76) 02/28/2023   23:52:14  ( -70.03,  -1.69)    2.50                16
 03/01/2023   00:43:01   (  69.22, 166.72) 03/01/2023   00:41:53  (  69.26, 164.90)   71.90                68
 03/03/2023   15:18:42   (  70.08, -53.38) 03/03/2023   15:19:11  (  70.06, -53.40)    1.92                29
 03/03/2023   16:09:24   ( -69.98, 114.08) 03/03/2023   16:08:41  ( -69.95, 114.08)    3.31                43
 03/06/2023   06:44:54   ( -70.31,-105.28) 03/06/2023   06:46:05  ( -70.26,-104.85)   16.64                71
 03/06/2023   07:35:35   (  70.04,  62.44) 03/06/2023   07:35:34  (  70.04,  62.47)    1.40                 1
 03/06/2023   08:26:17   ( -69.95,-130.10) 03/06/2023   08:25:04  ( -69.93,-130.05)    2.49                73
 03/08/2023   23:01:44   ( -70.07,  10.85) 03/08/2023   23:02:30  ( -70.09,  10.80)    2.65                46
 03/08/2023   23:52:28   (  69.97, 178.32) 03/08/2023   23:51:57  (  69.96, 178.27)    1.78                31