Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and NOAA-20
TLE Epoch: 2022 12 4.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(NOAA-20) NOAA-20 Lat/Lon    Distance(km)  Time Diff(sec)
 12/17/2022   01:56:52   (  72.88,  21.78) 12/17/2022   01:55:37  (  72.84,  21.98)    7.35                75
 12/17/2022   02:35:15   ( -60.85, -33.24) 12/17/2022   02:34:14  ( -60.85, -33.24)    0.17                61
 12/17/2022   03:26:21   (  61.99, 133.19) 12/17/2022   03:25:21  (  61.99, 133.19)    0.27                60
 12/17/2022   04:35:27   ( -50.13, 143.04) 12/17/2022   04:34:45  ( -50.12, 143.07)    2.40                42
 12/17/2022   05:25:02   (  53.51, -47.98) 12/17/2022   05:24:28  (  53.51, -47.98)    0.36                34
 12/17/2022   06:13:49   ( -59.69, 123.03) 12/17/2022   06:13:26  ( -59.70, 123.02)    2.26                23
 12/17/2022   07:01:25   (  69.65, -59.73) 12/17/2022   07:01:08  (  69.65, -59.74)    0.33                17
 12/17/2022   07:49:37   ( -76.57, 123.60) 12/17/2022   07:49:34  ( -76.56, 123.57)    1.73                 3
 12/17/2022   08:39:58   (  77.39, -65.73) 12/17/2022   08:39:59  (  77.39, -65.71)    0.54                 1
 12/17/2022   09:30:04   ( -78.40, 106.73) 12/17/2022   09:30:20  ( -78.40, 106.71)    0.59                16
 12/17/2022   10:20:40   (  78.55, -85.03) 12/17/2022   10:21:00  (  78.55, -85.03)    0.02                20
 12/17/2022   11:10:47   ( -79.40,  88.12) 12/17/2022   11:11:22  ( -79.40,  88.13)    0.43                35
 12/17/2022   12:01:24   (  79.51,-103.67) 12/17/2022   12:02:03  (  79.51,-103.67)    0.14                39
 12/17/2022   12:51:39   ( -79.98,  68.00) 12/17/2022   12:52:33  ( -79.99,  68.06)    1.42                54
 12/17/2022   13:42:13   (  80.17,-122.70) 12/17/2022   13:43:11  (  80.17,-122.70)    0.06                58
 12/17/2022   14:32:36   ( -80.36,  46.85) 12/17/2022   14:33:49  ( -80.37,  46.96)    2.38                73