Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 3 1.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(NOAA-19) NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 03/01/2021   19:50:59   (  78.41,-142.50) 03/01/2021   19:49:56  (  78.41,-146.77)   95.54                63
 03/01/2021   20:41:52   ( -78.74,  22.79) 03/01/2021   20:40:49  ( -78.75,  22.83)    2.19                63
 03/01/2021   21:32:37   (  78.75,-169.96) 03/01/2021   21:31:47  (  78.74,-169.99)    0.76                50
 03/01/2021   22:23:21   ( -78.74,  -2.58) 03/01/2021   22:22:49  ( -78.77,  -2.56)    3.62                32
 03/01/2021   23:14:06   (  78.75, 164.66) 03/01/2021   23:13:47  (  78.76, 164.61)    1.51                19
 03/02/2021   00:04:51   ( -78.77, -28.19) 03/02/2021   00:04:50  ( -78.75, -28.20)    2.69                 1
 03/02/2021   00:55:35   (  78.75, 139.29) 03/02/2021   00:55:47  (  78.77, 139.22)    2.98                12
 03/02/2021   01:46:20   ( -78.77, -53.56) 03/02/2021   01:46:50  ( -78.76, -53.59)    1.27                30
 03/02/2021   02:37:05   (  78.79, 113.67) 03/02/2021   02:37:47  (  78.78, 113.82)    3.19                42
 03/02/2021   03:27:49   ( -78.77, -78.94) 03/02/2021   03:28:50  ( -78.78, -78.98)    1.09                61
 03/02/2021   04:18:34   (  78.79,  88.30) 03/02/2021   04:19:47  (  78.80,  88.43)    3.08                73