Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 3.  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)
 01/03/2023   23:02:08   ( -70.13,  10.87) 01/03/2023   23:02:59  ( -70.14,  10.84)    1.48                51
 01/03/2023   23:52:52   (  70.01, 178.36) 01/03/2023   23:52:26  (  70.03, 178.34)    2.75                26
 01/04/2023   00:43:18   ( -69.07, -12.98) 01/04/2023   00:42:11  ( -69.09, -15.30)   92.14                67
 01/06/2023   14:28:38   (  71.11, -42.28) 01/06/2023   14:29:44  (  71.01, -39.60)   97.20                66
 01/06/2023   15:19:02   ( -70.08, 126.71) 01/06/2023   15:19:29  ( -70.09, 126.65)    2.42                27
 01/06/2023   16:09:46   (  69.96, -65.81) 01/06/2023   16:08:56  (  69.98, -65.86)    2.70                50
 01/09/2023   06:45:15   (  70.23,  74.91) 01/09/2023   06:46:26  (  70.23,  75.10)    7.07                71
 01/09/2023   07:35:56   ( -70.09,-117.55) 01/09/2023   07:35:57  ( -70.07,-117.49)    2.80                 1
 01/09/2023   08:26:38   (  69.87,  50.09) 01/09/2023   08:25:25  (  69.90,  49.92)    7.75                73
 01/11/2023   23:02:08   (  70.15,-169.19) 01/11/2023   23:02:56  (  70.14,-169.15)    2.09                48
 01/11/2023   23:52:50   ( -70.05,  -1.73) 01/11/2023   23:52:26  ( -70.04,  -1.66)    3.34                24
 01/14/2023   15:19:01   (  70.07, -53.31) 01/14/2023   15:19:25  (  70.08, -53.35)    1.75                24
 01/14/2023   16:09:43   ( -69.98, 114.16) 01/14/2023   16:08:55  ( -69.98, 114.14)    0.69                48