SCIENTIFIC AND SOCIETAL
OPPORTUNITIES OF AMISR FOR THE
UNIVERSITY OF ILORIN, NIGERIA.
J. O. Adeniyi,
Physics Department, University of
Ilorin, Ilorin Nigeria.
jadeniyi@unilorin.edu.ng or
segun47@yahoo.com
LOCATION
Geo-Latitude = 8.47 °N
Geo Longitude = 4.68 °E
Dip = 4.1 °S
RESEARCH EQUIPMENT & DATA
•
•
•
•
Ionosonde/Digisonde
GPS receiver
Magnetometer.
Data from Korogou and Ougadougou have also
been used extensively.
RESEARCH COLLABORATIONS
-ARPL ICTP Italy
-Institute for Scientific Research Boston
College USA
-Institute for Atmospheric Research
University of Massachusetts USA
-National Science Foundation (NASA) USA
-Cocody in Abidjan Cote d’Voir
RESEARCH PROJECTS
•
•
•
•
•
SPREAD –F
Magnetic Storm Effects
Variability of equatorial ionospheric parameters,
TEC Morphology
Improvement of the IRI model
BENEFIT OF AN AMISR
The following slides will indicate some examples
of specific areas where there are still
questions that an AMIR can help to unravel.
IONOGRAMS-APRIL 4 1800UT-APRIL 5 0600 LT
Dst-index
20
0
-20 0
day
4
6
day 5
12 18
0
6
day 6
12 18
0
6
12 18
250
-60
-80
QD
Day 4
Day 5
150
50
0.00E+00
-40
LT 0000
350
Height/km
40
DST-index for 4 -6 Feb. 2011
2.00E+05 4.00E+05 6.00E+05
Electron density/cm3
450
Q D
Day 4
Day 5
2.50E+05
5.00E+05
7.50E+05
Electron density/cm3
1.00E+06
Height/km
Height/km
LT1500
400
350
300
250
200
150
100
50
0.00E+00
8.00E+05
LT2100
350
250
150
50
0.00E+00
Q D
Day 4
Day 5
2.00E+05
4.00E+05
Electron density/cm3
6.00E+05
MAGNETIC STORM EFFECTS ON TEC
and NmF2
2010 APRIL
4
5
6
180
45
40
tec
160
NmF2
140
TEC UNIT
35
120
30
100
25
80
20
60
15
10
40
5
20
0
0
0
6
12
18
0
6
12
18
0
6
12
NmF2 X1010 electrons/m3
50
DIURNAL VARIATION OF TEC AT ILORIN
(a) DIURNAL AND MONTHLY MEDIAN VARIATION OF VTEC IN JANUARY
(b) DIURNAL AND MONTHLY MEDIAN VARIATION OF VTEC IN FEBRUARY
30
30
DTEC
DTEC / MTEC (TEC UNIT)
DTEC / MTEC (TEC UNIT)
DTEC
25
MTEC
20
15
10
5
0
1
3
6
9
12
15
LOCAL TIME (HRS)
18
21
25
MTEC
20
15
10
5
0
24
1
(c) DIURNAL AND MONTHLY MEDIAN VARIATION OF VTEC IN MARCH
9
12
15
LOCAL TIME (HRS)
18
21
24
30
DTEC
30
DTEC / MTEC (TEC UNIT)
DTEC / MTEC (TEC UNIT)
6
(d) DIURNAL AND MONTHLY MEDIAN VARIATION OF VTEC IN APRIL
35
MTEC
25
20
15
10
5
0
3
1
3
6
9
12
15
LOCAL TIME (HRS)
18
21
24
DTEC
25
MTEC
20
15
10
5
0
1
3
6
9
12
15
LOCAL TIME (HRS)
18
21
24
0
DRIFT PARAMETERS FROM DIGISONDE
DRIFT FROM hmF2
2010 DECEMBER SOLSTICE
15
Vd (dhm/dt) m/s
10
5
0
-5
-10
-15
10
5
0
-5
-10
-15
18 19 20 21 22 23 0
LT hr
1
2
3
4
5
17:30
18:30
19:30
20:30
21:30
22:30
23:30
00:30
01:30
02:30
03:30
04:30
05:30
Vd (dhm/dt) m/s
15
2010 SEPTEMBER EQUINOX
LT hr
CONCLUSION
The benefit of an AMIR located at the
Equatorial Region in Africa will go a long way
in improving our knowledge of the equatorial
ionosphere. This knowledge will greatly boost
and enhance a number of satellite application
facilities for the benefit of the society at large.
THANK YOU FOR YOUR ATTENTION