Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2022 12 26.  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)
 12/26/2022   23:02:09   (  70.12,-169.10) 12/26/2022   23:02:55  (  70.13,-169.14)    2.04                46
 12/26/2022   23:52:51   ( -70.03,  -1.65) 12/26/2022   23:52:25  ( -70.02,  -1.67)    1.37                26
 12/29/2022   15:19:04   (  70.10, -53.31) 12/29/2022   15:19:26  (  70.10, -53.32)    0.41                22
 12/29/2022   16:09:46   ( -70.01, 114.14) 12/29/2022   16:08:56  ( -69.99, 114.17)    2.40                50
 01/01/2023   06:45:17   ( -70.31,-105.18) 01/01/2023   06:46:28  ( -70.27,-104.84)   13.23                71
 01/01/2023   07:35:58   (  70.04,  62.55) 01/01/2023   07:35:57  (  70.05,  62.49)    2.75                 1
 01/01/2023   08:26:40   ( -69.95,-130.00) 01/01/2023   08:25:27  ( -69.95,-130.02)    1.14                73
 01/03/2023   23:02:08   ( -70.14,  10.85) 01/03/2023   23:02:59  ( -70.16,  10.87)    1.81                51
 01/03/2023   23:52:52   (  70.03, 178.32) 01/03/2023   23:52:26  (  70.04, 178.35)    1.57                26
 01/04/2023   00:43:18   ( -69.09, -13.00) 01/04/2023   00:42:11  ( -69.12, -15.27)   90.30                67
 01/06/2023   15:19:02   ( -70.08, 126.70) 01/06/2023   15:19:30  ( -70.08, 126.63)    2.60                28
 01/06/2023   16:09:46   (  69.97, -65.83) 01/06/2023   16:08:57  (  69.96, -65.89)    2.80                49