= Digisonde to Digisonde (D2D) Scheduling =
NOTE: Move older entries to the end of the table

== 1. Pruhonice to Juliusruh ==
|| '''Date from''' || '''Date to''' || '''Sch offsets, !min:sec''' || '''Frequencies, kHz''' || '''Switch Rules''' || '''Comments''' ||
|| 18 Feb 2021 || - || 02:35, 07:35, 12:35 || 4750 (06:30-16:00 UT), 3075 (16:00-06:30) || ||  ||
|| 23 Nov 2020 || - || 02:35, 07:35, 12:35 || 4750 (07:30-15:00 UT), 3075 (15:00-07:30) || ||  ||
|| 20 Oct 2020 || - || 02:35, 07:35, 12:35 || 4750 (06:30-16:00 UT), 3075 (16:00-06:30) || ||  ||
|| 17 Sep 2020 || - || 02:35, 07:35, 12:35 || 4750 (06:30-17:30 UT), 3075 (17:30-06:30) || ||  ||
|| 25 Jun 2020 || - || 02:35, 07:35, 12:35 || 4750 (05:30-18:30 UT), 3075 (18:30-05:30) || ||  ||
|| 01 Apr 2020 || - || 02:35, 07:35, 12:35 || 5050 (05:30-18:30 UT), 2475 (18:30-05:30) || ||  ||
|| 27 Nov 2019 || - || 02:35, 07:35, 12:35 || 5050 (08:00-14:45 UT), 2475 (14:45-08:00) || ||  ||
|| 16 Apr 2019 || - || 02:35, 07:35, 12:35 || 5050 (6:30-20:00 UT), 2475 (20:00-6:30) || || missing or unreliable DOP data: 21.06.2019 09 UT - 17.07.2019 09 UT (unsynchronized operation) ||
|| 27 Feb 2019 || - || 02:35, 07:35, 12:35 || 5050 (6:30-16:30 UT), 2475 (16:30-6:30) || || ||
|| 09 Nov 2018 || - || 02:35, 07:35, 12:35 || 5050 (6:45-15:30 UT), 2475 (15:30-6:45) || || ||
|| 02 Nov 2018 || - || 02:35, 07:35, 12:35 || 5050 (6:45-15:30 UT), 2450 (15:30-6:45) || || ||
|| 24 Sep 2018 || - || 02:35, 07:35, 12:35 || 5050 (6:45-17:00 UT), 2450 (17:00-6:45) || || ||
|| 28 May 2018 || - || 02:35, 07:35, 12:35 || 5050 (6:45-20:00 UT), 2450 (20:00-6:45) || || ||
|| 04 December 2017 || ... || 02:35, 07:35, 12:35 || 5760 (7:30-15:00 UT), 2450 (15:00-7:30) || || ||
|| 17 December 2015 || - || 02:35, 07:35, 12:35 || 7900 (8:00-14:00 UT), 5050 (14:00-15:30 & 7:00-8:00), 2450 (15:30-7:00) || || ||
|| 21 November 2015 || 17 December 2015 || 02:35, 07:35, 12:35 || 7900 (7:30-15:00 UT), 5050 (15:00-18:30 & 6:30-7:30), 2450 (18:30-6:30) || || ||
|| 13 November 2015 || 21 November || 02:35, 07:35, 12:35 || 7900 (7:30-15:00 UT), 5050 (15:00-18:30 & 5:00-7:30), 3050 (18:30-5:00) || ||accurate timing ||
|| 11 November 2015 || 13 November 2015 || 02:35, 07:35, 12:35 || 7900 (day), 3450 (night) || || accurate timing ||
|| 24 October 2015 || 11 November 2015 || 02:35, 07:35, 12:35 || 7900 (day), 3450 (night) || || back to normal ||
|| 9 October 2015 || 23 October 2015 || || || || PQ052 sync inaccurate ||
|| 21 August 2015 1303z || 8 October 2015 || || || || PQ052 no sync to GPS ||
|| 15 July 2015 1130z || 21 August 2015 1300z || || || || PQ052 no sync to GPS ||
|| 02 June 2015 0915z || 15 July 2015 1130z || || || || PQ052 down for repairs ||
|| 25 April 2015 0127z || 02 June 2015 0915z || 02:35, 07:35, 12:35 || 7900 (day) || continuous || 02:35 no reception at JR055 ||
|| 30 March 2015 0852z || 25 April 2015 0127z || 02:35, 07:35, 12:35 || 7900 (day), 3000 (night) || TBD || 02:35 no reception at JR055 ||
|| 17 March 2015 1559z || 30 March 2015 0829z || 04:18, 09:18, 14:18 || 8000 (day), 3000 (night) || TBD || ||
|| 12 March 2015 0310z || 17 March 2015 1540z || 10:00 || 8000 (day), 3000 (night) || TBD || ||

== 2. Dourbes to Juliusruh ==
|| '''Date from''' || '''Date to''' || '''Sch offsets, !min:sec''' || '''Frequencies, kHz''' || '''Switch Rules''' || '''Comments''' ||
|| 18 Feb 2021 || current || 04:15, 08:45, 09:15, 11:45, 14:15 || 6650 (06:30-16:00), 3450 (16:00-06:30) || || ||
|| 23 November 2020 || 18 Feb || 04:15, 08:45, 09:15, 11:45, 14:15 || 6650 (07:30-15:00), 3450 (15:00-07:30) || || ||
|| 20 October 2020 || 23 November 2020 || 04:15, 08:45, 09:15, 11:45, 14:15 || 6650 (06:30-16:00), 3450 (16:00-06:30) || || ||
|| 17 September 2020 || 20 October 2020 || 04:15, 08:45, 09:15, 11:45, 14:15 || 6650 (05:30-17:30), 3450 (17:30-05:30) || || ||
|| 25 Jun 2020 || 17 September 2020 || 04:15, 08:45, 09:15, 11:45, 14:15 || 6650 (05:30-18:30), 3450 (18:30-05:30) || || ||
|| 01 Apr 2020 || 25 Jun 2020 || 04:15, 08:45, 09:15, 11:45, 14:15 || 7250 (05:30-18:30), 3450 (18:30-05:30) || || ||
|| 14 Februari 2020 || 01 Apr 2020 || 04:15, 08:45, 09:15, 11:45, 14:15 || 7250 (06:30-16:30), 3450 (16:30-06:30) || || ||
|| 29 November 2019 || 14 Februari 2020 || 04:15, 08:45, 09:15, 11:45, 14:15 || 7250 (08:00-14:45), 3450 (14:45-08:00) || || ||
|| 16 September 2019 || 29 Nov 2019 || 04:15, 08:45, 09:15, 11:45, 14:15 || 7250 (06:30-16:15), 3450 (16:15-06:30) || || ||
|| 16 April 2019 || 16 September 2019 || 04:15, 08:45, 09:15, 11:45, 14:15 || 7250 (06:30-20:00), 3450 (20:00-06:30) || || ||
|| 27 February 2019 || 16 April 2019 || 04:15, 08:45, 09:15, 11:45, 14:15 || 7250 (06:30-16:30), 3450 (16:30-06:30) || || Change made after 12 UT ||
|| 02 November 2018 || 7 February 2019 || 04:15, 08:45, 09:15, 11:45, 14:15 || 7250 (06:45-15:30), 3450 (15:30-06:45) || || ||
|| 15 October 2018 || 27 February 2019 || 04:15, 08:45, 09:15, 11:45, 14:15 || 7250 (07:30-17:00), 3500 (17:00-07:30) || || Change made after 12 UT ||
|| 25 September 2018 || 5 October 2018 || 04:15, 09:15, 14:15 || 7250 (07:30-17:00), 3500 (17:00-07:30) || || Staggered evening frequency switch for compatibility with DB049-EB040 link ||
|| 24 September 2018 || 25 September 2018 || 04:15, 09:15, 14:15 || 7250 (07:30-19:00), 3500 (19:00-07:30) || || Started using 128-chip code ||
|| 16 April 2018 || 24 September 2018 || 03:55, 08:55, 13:55 || 7250 (06:45-20:30), 3500 (20:30-06:44) || || ||
|| 9 April 2018 || 16 April 2018 || 03:55, 08:55, 13:55 || 7500 (06:45-20:30), 3500 (20:30-06:44) || || ||
|| 15 March 2018 || 9 April 2018 || 03:55, 08:55, 13:55 || 7500 (06:45-19:00), 3500 (19:00-06:45) || || ||
|| Dec 2017 || 15 March 2018 || - || - || || no D2D link active ||
|| 28 August 2015 0853 || - || 08:40 || 8950 (day) || || ||
|| 27 August 2015 1434z || 28 August 2015 0853z || 04:15, 09:15 || 8950 (day) || || ||

== 3. Dourbes to Roquetes ==

Sopron also listening to Dourbes Tx starting 2018-10-11
|| '''Date from''' || '''Date to''' || '''Sch offsets, !min:sec''' || '''Frequencies, kHz''' || '''Switch Rules''' || '''Comments''' ||
|| 18 February 2021 || Current || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:15-17:30), 4725 (17:30-07:15) || || At 02:09 only during night ||
|| 23 November 2020 || 18 February 2021 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:15-16:45), 4725 (16:45-07:15) || || At 02:09 only during night ||
|| 19 October 2020 || 23 November 2020 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:00-17:30), 4725 (17:30-07:00) || || At 02:09 only during night ||
|| 17 September 2020 || 19 October 2020 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:15-19:30), 4725 (19:30-07:15) || || At 02:09 only during night ||
|| 30 April 2020 || 17 September 2020 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:15-21:30), 4725 (21:30-07:15) || || At 02:09 only during night ||
|| 1 April 2020 || 30 April 2020 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:15-19:30), 4725 (19:30-07:15) || || At 02:09 only during night ||
|| 9 March 2020 || 1 April 2020 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:15-18:15), 4725 (18:15-07:15) || || At 02:09 only during night ||
|| 12 February 2020 || 9 March 2020 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:30-17:15), 4725 (17:15-07:30) || || At 02:09 only during night ||
|| 29 November 2019 || 12 February 2020  || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:30-16:15), 4725 (16:15-07:30) || || At 02:09 only during night ||
|| 13 November 2019 || 29 November 2019  || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:15-17:00), 4725 (17:00-07:15) || || At 02:09 only during night ||
|| 22 October 2019 || 13 November 2019  || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:00-17:30), 4725 (17:30-07:00) || || At 02:09 only during night ||
|| 3 October 2019 || 22 October 2019  || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:30-18:15), 4725 (18:15-07:30) || || At 02:09 only during night ||
|| 16 September 2019 || 3 October 2019 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:15-19:15), 4725 (19:15-07:15) || || At 02:09 only during night ||
|| 29 April 2019 || 16 September 2019 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (06:45-21:30), 4725 (21:30-06:45) || || At 02:09 only during night ||
|| 15 April 2019 || 29 April 2019 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (06:45-20:00), 4725 (20:00-06:45) || || At 02:09 only during night ||
|| 18 February 2019 || 15 April 2019 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:00-18:00), 4725 (18:00-07:00) || || At 02:09 only during night ||
|| 20 November 2018 || 18 February 2019 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:15-16:30), 4725 (16:30-07:15) || || At 02:09 only during night ||
|| 26 October 2018 || 20 November 2018 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:15-17:30), 4725 (17:30-07:15) || || At 02:09 only during night ||
|| 24 September 2018 || 26 October 2018 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:30-19:00), 4725 (19:00-07:30) || || At 02:09 only during night ||
|| 9 April 2018 || 24 September 2018 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (06:45-20:30), 4725 (20:30-06:44) || || At 02:09 only during night ||
|| 9 March 2018 || 8 April 2018 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (06:45-19:00), 4725 (19:00-06:45) || || At 02:09 only during night ||
|| 28 February 2018 || 8 March 2018 || 02:09, 04:39, 07:09, 09:39, 12:09, 14:39 || 9125 (07:15-17:30), 4725 (17:30-07:15) || || At 02:09 only during night ||
|| 19 February 2018 || 27 February 2018 || Campaign to test 128-chip and 64-chip codes || || || ||
|| 5 December 2017 || 9 April 2018 || 03:40, 08:40, 13:40 || 9125 (07:30-16:30), 4725 (16:30-07:30) || || TV: Made effective after 10:00;  DA: Made effective after 9:10 ||
|| 21 September 2017 || 5 December 2017 || 03:40, 08:40, 13:40 || 9125 (06:45-19:15), 4725 (19:15-06:45) || || DA: Made effective after 09:45 ||
|| 15 May 2017 || 21 September 2017 || 03:40, 08:40, 13:40 || 9125 (6:15-21:15), 4725 (21:15-6:15) || || DA: Made effective after 20:15 ||
|| 11 April 2017 || 15 May || 03:40, 08:40, 13:40 || 9125 (6:15-20:15), 4725 (20:15-6:15) || || DA: Made effective after 20:15 ||
|| 21 March 2017 || 11 April 2017 || 03:40, 08:40, 13:40 || 9125 (6:15-19:00), 4725 (19:00-6:15) || || ||
|| 20 February 2017 || 21 March 2017 || 03:40, 08:40, 13:40 || 9125 (6:45-17:30), 4725 (17:30-6:45) || || ||
|| 27 January 2017 1230 || 20 February 2017 || 03:40, 08:40, 13:40 || 9125 (7:15-16:30), 4725 (16:30-7:15) || || ||
|| 13 December 2016 0845 || 26 January 2017 1230 || 03:40, 08:40, 13:40 || 10425 (7:45-16:00), 4725 (16:00-7:45) || || ||
|| 13 October 2016 1630 || 13 December 2016 0725 || 03:40, 08:40, 13:40 || 10425 (9:15-16:30), 7825 (6:15-9:15 & 16:30-19:15), 4355 (19:15-6:15) || || ||
|| 11 October 2016 0930 || 13 October 2016 1630 || 03:40, 08:40, 13:40 || 10425 (9:45-16:30), 7675 (6:45-9:45 & 16:30-19:15), 4355 (19:15-6:45) || || ||
|| 7 September 2016 0725 || 11 October 2016 0930 || 03:40, 08:40, 13:40 || 8950 (7:00-21:00), 4845 (21:00-7:00) || || ||
|| 9 May 2016 1220 || 7 September 2016 0725 || 03:40, 08:40, 13:40 || 11145 (9:45-18:30), 8950 (6:45-9:45 & 18:30-21:00), 4845 (21:00-6:45) || || ||
|| 23 March 2016 1100 || 9 May 2016 1220 || || 11145 (9:45-18:30), 8950 (6:45-9:00 & 18:30-19:45), 4845 (19:45-6:45) || || ||
|| 15 February 2016 1830 || 23 March 2016 1100 || || 11350 (9:00-18:30), 8950 (7:00-9:00 & 16:30-18:30), 4845 (18:30-7:00) || || ||
|| 11 December 2015 1630 || 15 February 2016 1830 || || 8950 (7:30-16:30), 3450 (16:30-7:30) || || ||
|| 30 October 2015 1800 || 11 December 2015 1630 || || 8950 (7:00-18:00), 4845 (18:00-7:00) || || ||
|| 29 October 2015 1900 || 30 October 2015 1800 || || 8950 (7:00-19:00), 4400 (19:00-7:00) || || ||
|| 28 October 2015 1900 || 29 October 2015 1900 || || 8950 (7:00-19:00), 4000 (19:00-7:00) || || ||
|| 30 August 2015 0000 || 28 October 2015 1900 || || 8950 (7:00-22:00), 4845 (22:00-7:00) || || ||

== 4. Dourbes to Athens [Suspended] ==
|| '''Date from''' || '''Date to''' || '''Sch offsets, !min:sec''' || '''Frequencies, kHz''' || '''Switch Rules''' || '''Comments''' ||
|| 29 May 2017 || 2 June 2017 || 03:40, 08:40, 13:40 || 9125 (6:15-21:15), 4725 (21:15-6:15) || || New transmitter card testing period for Athens ||
|| 16 May 2017 0735 || 29 May 2017 || 03:40, 08:40, 13:40 || 9125 (6:15-21:15), 4725 (21:15-6:15) || || ||
|| 12 April 2017 0825 || 16 May 2017 0735 || 03:40, 08:40, 13:40 || 9125 (6:15-20:15), 4725 (20:15-6:15) || || ||
|| 6 April 2017 1055 || 12 April 2017 0825 || 03:40, 08:40, 13:40 || 9125 (6:15-19:00), 4725 (19:00-6:15) || || ||
|| 21 February 2017 1250 || 11 March 2017 || 03:40, 08:40, 13:40 || 9125 (6:45-17:30), 4725 (17:30-6:45) || || ||
|| 27 January 2017 0948 || 21 February 2017 1250 || 03:40, 08:40, 13:40 || 9125 (7:15-16:30), 4725 (16:30-7:15) || || ||
|| 13 December 2016 0845 || 27 January 2017 0948 || 03:40, 08:40, 13:40 || 10425 (7:45-16:00), 4725 (16:00-7:45) || || ||
|| 13 October 2016 1200 || 13 December 2016 0725 || 03:40, 08:40, 13:40 || 10425 (9:15-16:30), 7825 (6:15-9:45 & 16:30-19:15), 4355 (19:15-6:15) || || ||
|| 11 October 2016 0909 || 13 October 2016 1200 || 03:40, 08:40, 13:40 || 10425 (9:45-16:30), 7675 (6:45-9:45 & 16:30-19:15), 4355 (19:15-6:45) || || ||
|| 7 September 2016 0749 || 11 October 2016 0909 || 03:40, 08:40, 13:40 || 8950 (day), 4845(night) || || ||
|| 6 May 2016 0928 || 7 September 2016 0749 || 03:40, 08:40, 13:40 || 11145 (day), 4845(night) || || ||

== 5. Athens to Roquetes ==
|| '''Date from''' || '''Date to''' || '''Sch offsets, !min:sec''' || '''Frequencies, kHz''' || '''Switch Rules''' || '''Comments''' ||
|| 13 March 2018 || Current || [03:15, 08:15, 13:15]@128-chip || 11750 (128-chip/06:45-19:00) 4725 (19:00-06:45) || || AM: Made effective after 09:55 ||
|| 16 January 2018 || 13 March 2018 || - || - || || AM: AT138 offline due to amplifier failure ||
|| 22 December 2017 || 16 January 2018 || [03:15, 08:15, 13:15]@128-chip, [03:40, 08:40, 13:40]@16-chip || 11750 (128-chip/07:30-16:30), 9525 (16-chip/07:30-16:30) 4725 (16:30-07:30) || || AM: Made effective after 12:20;  DA: Made effective after 12:30 ||
|| 11 December 2017 || 22 December 2017 || [03:15, 08:15, 13:15]@128-chip, [03:40, 08:40, 13:40]@16-chip || 9525 (128-chip/07:30-16:30), 9525 (16-chip/07:30-16:30) 4725 (16:30-07:30) || || AM: Made effective after 09:20 ||
|| 5 December 2017 || 11 December 2017 || 03:15, 08:15, 13:15 || 9525 (07:30-16:30), 4725 (16:30-07:30) || || AM: Made effective after 10:00;  DA: Made effective after 9:10 ||
|| 21 September 2017 || 5 December 2017 || 03:15, 08:15, 13:15 || 9525 (6:14:58-21:14:59), 4725 (21:14:59-6:14:58) || || DA: Made effective after 09:45 ||
|| 2 June 2017 || 21 September 2017 || 03:15, 08:15, 13:15 || 9525 (6:14:58-21:14:59), 4725 (21:14:59-6:14:58) || || ||
|| 29 May 2017 || 2 June 2017 || 03:15, 08:15, 13:15 || 9525 (6:14:58-21:14:59), 4725 (21:14:59-6:14:58) || || New transmitter card testing period for Athens ||