Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 23.  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)
 03/24/2023   23:01:31   ( -70.11,  10.80) 03/24/2023   23:02:35  ( -70.13,  10.80)    2.14                64
 03/24/2023   23:52:15   (  70.00, 178.28) 03/24/2023   23:52:02  (  70.03, 178.29)    2.90                13
 03/25/2023   00:42:49   ( -69.49, -13.64) 03/25/2023   00:41:38  ( -69.58, -14.69)   41.86                71
 03/27/2023   15:18:23   ( -70.10, 126.60) 03/27/2023   15:19:02  ( -70.07, 126.60)    3.07                39
 03/27/2023   16:09:07   (  69.99, -65.93) 03/27/2023   16:08:29  (  69.97, -65.91)    3.13                38
 03/30/2023   06:44:41   (  70.62,  74.24) 03/30/2023   06:45:51  (  70.53,  75.51)   48.15                70
 03/30/2023   07:35:14   ( -70.05,-117.55) 03/30/2023   07:35:28  ( -70.03,-117.57)    2.21                14
 03/30/2023   08:25:58   (  69.95,  49.92) 03/30/2023   08:24:55  (  69.92,  49.92)    2.73                63
 04/01/2023   23:01:22   (  70.11,-169.18) 04/01/2023   23:02:22  (  70.11,-169.19)    0.65                60
 04/01/2023   23:52:04   ( -70.02,  -1.71) 04/01/2023   23:51:52  ( -70.01,  -1.71)    0.85                12
 04/02/2023   00:42:37   (  69.33, 166.61) 04/02/2023   00:41:28  (  69.39, 165.10)   59.58                69
 04/04/2023   15:18:13   (  70.09, -53.36) 04/04/2023   15:18:46  (  70.10, -53.31)    2.40                33
 04/04/2023   16:08:55   ( -69.99, 114.11) 04/04/2023   16:08:16  ( -70.00, 114.17)    2.62                39