Arecibo World Day Data Holdings Since 1986

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Note on Duration: The duration indicates starting and ending time only. Data may not be continuous during the time-interval indicated.

Note on Data Types:

· B: High resolution plasma concentration obtained by using barker-code. Typically covers the altitude range from 60 to 550 km.

· E: E-region ion drifts, electron/ion temperature, neutral winds and plasma concentration.

· F: F-region (~140 - 660 km) ion drifts, electron/ion temperature, and plasma concentration.

· T: Topside (~250 - 3000 km), electron, H⁺, He⁺, O⁺ temperature, fraction of H⁺, He⁺, total ion concentration, ion drifts (may not be available simultaneously).

|| 1986 || 1987 || 1988 || 1989 || 1989 ||

|| 1990 || 1991 || 1992 || 1993 || 1994 || 1995 || 1996 || 1997 || 1998 || 1999 ||

|| 2000 || 2001 || 2002 || 2003 ||

Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1986	01	14/11:10 – 17/12:55	F B
	03	05/11:34 – 06/11:49	F B
	04	01/09:50 – 04//11:55	F B
	05	06/11:32 – 07/11:58	F B
	06	04/09:40 – 05/11:54	F B
	08	27/10:50 – 28/09:45	F B
	09	23/10:47 – 26/11:56	F B
	11	07/21:41 – 09/06:10	F B
	12	10/13:28 – 11/12:03	F B
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1987	04	28/11:00 – 29/11:53	F B
	05	14/12:23 – 14/21:52	F B
	06	10/10:39 – 20/16:26	F B
	08	26/11:21 – 27/06:51	F B
	09	21/07:59 – 26?15;27	F B E	LTCS 1
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1888	01	12/07:08 – 16/06:28	F B
	03	16/12:09 – 20/21:51	F B
	06	13/06:38 – 14/07:57	F B
	07	12/16:46 – 13/17:50	F B
	09	12/06:36 – 13/18:15	F B
	11	09/06:45 – 10/13:54	F B
	12	05/10:55 – 11/11:33	F B E	LTSC 2
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1989	03	06/07:35 – 07/06:18	F B	AIDA campaign
	04	11/112:40 – 12/17:50	F B
	05 – 06	30/17.05 – 04/15:11		LTCS 3
	08	01/14:32 – 02/16:57	F B
	08 – 09	28/08:30 – 01/08:30	F B
	10	02/08:55 – 06/16:16	F B
	10 – 11	31/10:29 – 01/15:38	F B
	11	27/08:41 – 28/18:26	F B
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1990	02	12/12:00 – 17/23:49	F B E
	05	21/11:12 – 22/15:44	F B	LTCS 4 line-of-sight data only
	06	25/13:46 – 29/14:52	F B
	09	20/14:24 – 20/20:24	F B
	11	14/20:04 – 17/22:10	F B
	12	08/12:28 – 08/20:15	F B
	12	17/09:42 – 19/17:50	F B
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1991	01	11/10:00 – 12/11:48	F B
	03	14/15:30 – 19/05:40	F B E	LTCS 5, large gaps
	04	09/12:36 – 10/17:51	F B
	06	05/16:17 – 06/17:51	F B	Storm period
	06	11/10:18 – 12/17:51	F B	Storm period
	07	10/05:43 – 11/15:54	F B
	08	04/19:06 – 05/05:36	F B
	09	10/09:29 – 11/15:35	F B
	10	07/09:08 – 09/16:49	F B
	12	05//20:44 – 10/17:19	F B	LTCS6 large data gaps
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1992	01	27/10:07 – 28/19:18	F B
	03 – 04	30/10:55 – 03/16:43	F B E	LTCS 7
	05	05/10:22 – 06/16:54	F B
	06	23/12:38 – 24/16:43	F B
	07 – 08	30/15:34 – 05/16:34	F B E	LTCS 8
	09	22/11:51 – 23/02:58	F B
	10	27/10:15 – 28/17:49	F B
	11	23/10:06 – 25/23:48	F B
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1993	01	20/10:27 – 30/15:16	F B E	LTCS 9 gaps around midnight
	03	17/11:27 – 18/16:47	F B
	05	18/10:32 – 19/16:47	F B
	06	15/09:40 – 16/17:45	F B
	07	20/09:18 – 21/16:53	F B
	10	18/15:43 – 19/15:42	F B
	11	09/10:00 – 10/14:52	F B
	12	07/12:11 – 08/15:47	F B
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1994	01		F B
	02	08/17:14 – 09/07:53	F B	Gregorian upgrading started
	04	12/17:31 – 13/07:38	F B
	06	08/20:34 – 09/10:16	F B
	07	05/19:14 – 06/08:16	F B
	08	10/18:53 – 16/07:12	F B	LTCS10 mostly line-of-sight nighttime data
	09	06/18:50 – 07/07:30	F B
	10	04/19:00 – 05/07:20	F B
	11	08/18:40 – 09/07:08	F B
	12	06/17:27 – 07/07:09	F B
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1995	02 – 03	28/20:06 – 02/07:04	F B
	03	28/17:34 – 29/07:04	F B
	04	25/19:34 – 30/24:00	F	Not a world day, contact staff
	05	01/00:26 – 05/23:50	F B	LTCS 11 nighttime and line-of-sight only
	08	22/20:54 – 24/07:13	F B
	09	27/16:44 – 28/07:04	F B
	10	23/17:44 – 27/07:05	F B	LTCS 12 nighttime and line-of-sight only
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1996
	03	19/??:?? – 22/??:??		LTCS 13 no data
	10	08/??:?? – 08/??:??		LTCS 14 no data
No World Day data in 1996 due to Gregorian construction.
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1997	01	06/??:?? – 10/??:??	F B	LTCS 15 nighttime line-of-sight data only
	02	01/??:??
	06	23/??:?? – 27/??:??		LTCS 16 no data
	09			No WD data due to Gregorian commissioning
	10	21/23:00 – 23/07:00	F B	WLS nighttime, vertical pointing
	11	04/??:?? – 05/??:??		WD, no data due to Gregorian commissioning
	11	13/??:?? – 20/??:??	B	Not a WD; Contact John Mathews, John Cho or Staff
	12	02/??:?? – 04/??:??	T	POLITE, nighttime only
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1998	01	20/??:?? – 21/??:??	F B	Nighttime only
	03	23/??:?? – 27/??:??		LTCS 17; nighttime only
	04	27/??:?? – 29/??:??		Nighttime only
	05	26/??:?? – 28/??:??		POLITE
	06	23/17:21 – 24/15:59	F B
	08	18/11:18 – 19:15:45	F B
	09	21/??:?? – 25/??:??		LTCS 18 cancelled due to Hurricane Georges
	10	19/11:36 – 21/18:02	F B
	11	22/??:?? – 24/??:??		POLITE
	12	08/??:?? – 09/??:??		No data
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
1999	01	12/??:?? – 13/??:??		Database
	02	09/09:02 – 12/17:48	F B	Global Iono-Thermo Coupling, gaps exist
	03	08/17:22 – 12/17:59	F B E	LTCS 19
	04	20/19:40 – 21/21:10	F B	WLS
	07	06/15:20 – 08/17:58	F B	Global ionospheric convection
	09	07/12:26 – 09/18:01	F B	WLS (?)
	10	08/??:?? – 09/??:??		POLITE
	10	12/12:44 – 14/14:54	F B E	LTCS 20
	12	14/??:?? – 15/??:??		POLITE
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
2000	01	06/14:36 – 07/20:25	B E F T	POLITE
	03	14/11:41 – 17/17:57	F B	Global convection
	04	11/11:45 – 13/16:00	F B
	06	13/18:00 – 14/08:00	B E F	Transmitter and receiver problems, no useful data
	07	05/10:59 – 07/17:20	E F T
	09	23/07:14 – 27/17:56	B E F	WLS
	12	11/11:27 – 13/09:23	B E	LTCS 21
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
2001	02	13/11:49 – 15/16:00	B E
	04	17/14:18 – 19/20:01	E F	WLS
	07	11/??:?? – 12/??:?? 13/??:?? – 14/??:??		First World Day experiment with Dual Beam
	09	10/12:00 – 14/8:00	E F	LTCS 22
	10	10/11:00 – 11/14:45	F T	WLS; POLITE
		16/11:07 – 18/03:45
		18/07:57 – 18/09:19	E T
	11	10/11:55 – 14/??:??	E F
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
2002	03	26/07:55 – 26/17:00
	04	15/13:00 – 17:18:00	B E F
	06	11/17:13 – 12/18:00
	08	13/17:54 – 14/18:00	E F
	10	07/17:15 – 11/08:30	B E F	POLITE
	11	11/14:15 – 12/08:00 12/16:30 – 13/16:00	B E F	LTSC 23
	12	03/12:00 – 05/12:00	E F
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Year	Month	Duration (dd/hh:mm)	Data Type	Comments
2003	03	24/??:?? – 28/??:??		LTCS 24
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Last updated on: 03/25/2003 by Carlos A. Vargas-Alvarez

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