Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 19.  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)
 03/19/2023   15:18:32   (  70.06, -53.36) 03/19/2023   15:19:08  (  70.08, -53.40)    2.19                36
 03/19/2023   16:09:14   ( -69.97, 114.09) 03/19/2023   16:08:38  ( -69.96, 114.07)    1.27                36
 03/22/2023   06:44:50   ( -70.72,-105.92) 03/22/2023   06:45:59  ( -70.64,-104.34)   58.79                69
 03/22/2023   07:35:23   (  70.03,  62.47) 03/22/2023   07:35:35  (  70.04,  62.43)    1.93                12
 03/22/2023   08:26:05   ( -69.94,-130.08) 03/22/2023   08:25:05  ( -69.93,-130.09)    0.97                60
 03/24/2023   23:01:31   ( -70.11,  10.80) 03/24/2023   23:02:35  ( -70.13,  10.80)    1.90                64
 03/24/2023   23:52:15   (  70.01, 178.28) 03/24/2023   23:52:02  (  70.02, 178.28)    1.47                13
 03/25/2023   00:42:49   ( -69.49, -13.64) 03/25/2023   00:41:38  ( -69.58, -14.69)   41.84                71
 03/27/2023   15:18:23   ( -70.10, 126.60) 03/27/2023   15:19:02  ( -70.07, 126.60)    2.82                39
 03/27/2023   16:09:06   (  69.94, -65.85) 03/27/2023   16:08:29  (  69.96, -65.91)    3.13                37
 03/30/2023   06:44:41   (  70.62,  74.25) 03/30/2023   06:45:51  (  70.52,  75.51)   47.84                70
 03/30/2023   07:35:14   ( -70.04,-117.54) 03/30/2023   07:35:28  ( -70.03,-117.56)    1.58                14
 03/30/2023   08:25:58   (  69.94,  49.93) 03/30/2023   08:24:55  (  69.92,  49.92)    2.92                63
 04/01/2023   23:01:22   (  70.10,-169.16) 04/01/2023   23:02:22  (  70.11,-169.19)    1.59                60
 04/01/2023   23:52:04   ( -70.00,  -1.69) 04/01/2023   23:51:52  ( -70.01,  -1.71)    1.07                12
 04/02/2023   00:42:37   (  69.32, 166.62) 04/02/2023   00:41:28  (  69.39, 165.10)   60.28                69