IU Observatory Solar Observers 1951–2026
85 observers · 20,614 observation days
The current solar observation team and project team (with photos): Project Team →
Top ten by number of observations
Top ten by observations in a single year
Top ten by yearly average
Observers who took part in the solar observations, 1951–2026 Click a column heading to sort
| # | Name | Code | Status | First obs. | Last obs. | Years | Days | Days/yr | Best year |
|---|
| 1 |
Edibe Tüzemen Ballı |
ET |
Staff |
04.01.1951 |
13.11.1962 |
12 |
642 |
53.5 |
87 (1951) |
| 2 |
Wolfgang Gleissberg |
WG |
Staff |
07.01.1951 |
21.04.1958 |
8 |
487 |
60.9 |
120 (1951) |
| 3 |
Metin Hotinli |
MH |
Staff |
25.01.1951 |
22.11.1962 |
12 |
390 |
32.5 |
58 (1952) |
| 4 |
Adnan Kıral |
AK |
Staff |
02.11.1951 |
25.04.1964 |
14 |
553 |
39.5 |
95 (1953) |
| 5 |
B. S. |
BS |
Staff |
06.06.1953 |
09.05.1954 |
2 |
36 |
18.0 |
31 (1953) |
| 6 |
D. E. |
DE |
Staff |
02.09.1953 |
12.01.1954 |
2 |
8 |
4.0 |
7 (1953) |
| 7 |
Kamuran Avcıoğlu Özemre |
KA |
Staff |
05.02.1954 |
11.10.1965 |
11 |
343 |
31.2 |
69 (1955) |
| 8 |
A. G. |
AG |
Staff |
06.03.1954 |
24.09.1956 |
3 |
63 |
21.0 |
40 (1954) |
| 9 |
Fatma Yılmaz Esin |
FY |
Staff |
21.07.1955 |
14.08.1986 |
15 |
357 |
23.8 |
62 (1957) |
| 10 |
Ahmet Yüksel Özemre |
YÖ |
Staff |
14.06.1957 |
27.08.1957 |
1 |
22 |
22.0 |
22 (1957) |
| 11 |
Ayten Belger |
AB |
Staff |
06.01.1958 |
29.04.1961 |
4 |
163 |
40.8 |
56 (1958) |
| 12 |
Süheyla Gökgör |
SG |
Staff |
15.01.1958 |
26.04.1961 |
4 |
149 |
37.3 |
53 (1959) |
| 13 |
Bilgin Güçtekin |
BG |
Staff |
16.07.1959 |
18.05.1964 |
6 |
118 |
19.7 |
38 (1960) |
| 14 |
Tevfik Salim Selim |
TSS |
Staff |
26.01.1960 |
30.01.1960 |
1 |
2 |
2.0 |
2 (1960) |
| 15 |
Pervin Olgun |
PO |
Staff |
05.01.1961 |
27.10.1962 |
2 |
93 |
46.5 |
54 (1961) |
| 16 |
Salih Karaali |
SK |
Staff |
09.04.1961 |
25.07.1978 |
15 |
548 |
36.5 |
163 (1964) |
| 17 |
Ozdemir Mustafa |
ÖM |
Staff |
24.11.1962 |
29.06.1963 |
2 |
19 |
9.5 |
17 (1963) |
| 18 |
Abdülkadir Akif |
AA |
Staff |
25.11.1962 |
30.06.1963 |
2 |
21 |
10.5 |
18 (1963) |
| 19 |
Atilla Özgüç |
AÖ |
Staff |
06.02.1963 |
17.09.1965 |
3 |
201 |
67.0 |
80 (1965) |
| 20 |
ü. Yarbasan |
ÜY |
Staff |
05.03.1963 |
30.09.1963 |
1 |
37 |
37.0 |
37 (1963) |
| 21 |
I. Ekmekçi |
ıE |
Staff |
06.03.1963 |
24.09.1963 |
1 |
14 |
14.0 |
14 (1963) |
| 22 |
Gülçin Erişkin |
GE |
Staff |
07.03.1963 |
27.09.1963 |
1 |
36 |
36.0 |
36 (1963) |
| 23 |
Sabahat Bengi |
SB |
Staff |
23.06.1964 |
21.02.1968 |
5 |
183 |
36.6 |
53 (1967) |
| 24 |
Nazım Kulalı |
NK |
Staff |
29.06.1964 |
18.06.1965 |
2 |
26 |
13.0 |
18 (1964) |
| 25 |
Latif Topaktaş |
LT |
Staff |
09.07.1965 |
11.07.1971 |
6 |
235 |
39.2 |
87 (1967) |
| 26 |
Hakkı ismail Erdoğan |
HıE |
Staff |
15.07.1965 |
02.10.1966 |
2 |
87 |
43.5 |
48 (1966) |
| 27 |
Dursun Koçer |
DK |
Staff |
09.08.1966 |
30.08.1974 |
7 |
144 |
20.6 |
66 (1967) |
| 28 |
Samet Marşoğlu |
SM |
Staff |
29.03.1967 |
16.04.1983 |
10 |
240 |
24.0 |
54 (1968) |
| 29 |
Ali Ertuğrul |
AE |
Staff |
07.06.1967 |
31.08.1967 |
1 |
18 |
18.0 |
18 (1967) |
| 30 |
Mustafa Önal |
MÖ |
Staff |
03.04.1968 |
14.02.1971 |
4 |
219 |
54.8 |
80 (1968) |
| 31 |
Ahmet Topalbekiroğlu |
AT |
Staff |
08.04.1968 |
02.03.1970 |
3 |
167 |
55.7 |
84 (1969) |
| 32 |
Taner Yılmaz |
TY |
Staff |
14.08.1969 |
26.02.1970 |
2 |
29 |
14.5 |
22 (1969) |
| 33 |
Esat Hamzaoğlu |
EH |
Staff |
18.02.1970 |
29.06.1970 |
1 |
34 |
34.0 |
34 (1970) |
| 34 |
Feyza Birsen Akkaya Yapulu |
FA |
Staff |
14.05.1970 |
24.04.1978 |
9 |
659 |
73.2 |
119 (1976) |
| 35 |
Müzeyyen Aktaş |
MA |
Staff |
20.05.1970 |
09.11.1971 |
2 |
109 |
54.5 |
66 (1971) |
| 36 |
Hasan Ayata |
HA |
Staff |
10.06.1970 |
21.10.1971 |
2 |
97 |
48.5 |
59 (1971) |
| 37 |
Hüseyin Menteşe |
HM |
Staff |
06.07.1971 |
22.08.1988 |
18 |
858 |
47.7 |
119 (1973) |
| 38 |
Ethem Derman |
ED |
Staff |
22.01.1972 |
05.01.1981 |
9 |
397 |
44.1 |
115 (1973) |
| 39 |
Gökmen Tektunalı |
GT |
Staff |
24.11.1974 |
07.02.1982 |
9 |
197 |
21.9 |
52 (1978) |
| 40 |
Orhan Gölbaşı |
OG |
Staff |
18.12.1974 |
27.05.1983 |
8 |
188 |
23.5 |
48 (1981) |
| 41 |
Güzin Akseli |
GA |
Staff |
20.03.1975 |
15.08.1979 |
5 |
479 |
95.8 |
115 (1976) |
| 42 |
Adnan Ökten active |
AÖ0 |
Staff |
26.07.1978 |
03.10.2026 |
23 |
706 |
30.7 |
130 (1979) |
| 43 |
Mustafa Türker Özkan |
TÖ |
Staff |
01.12.1979 |
14.06.1988 |
10 |
487 |
48.7 |
94 (1980) |
| 44 |
Ahmet Talat Saygaç |
TS |
Staff |
06.03.1983 |
24.07.2009 |
11 |
336 |
30.5 |
80 (1985) |
| 45 |
Hulusi Gülseçen |
HG |
Staff |
03.06.1983 |
28.09.1988 |
6 |
317 |
52.8 |
79 (1984) |
| 46 |
Füsun Limboz |
FL |
Staff |
07.07.1986 |
20.08.1988 |
3 |
95 |
31.7 |
45 (1987) |
| 47 |
Serap Güngör Ak |
SG0 |
Staff |
01.04.1988 |
26.08.2004 |
14 |
297 |
21.2 |
42 (1994) |
| 48 |
Hikmet Çakmak |
HÇ |
Staff |
05.07.1988 |
09.02.2024 |
19 |
1082 |
56.9 |
116 (2012) |
| 49 |
Hasan Hüseyin Esenoğlu |
HE |
Staff |
11.07.1988 |
15.01.2011 |
22 |
572 |
26.0 |
51 (1990) |
| 50 |
Mevlana Başal |
MB |
Staff |
29.08.1988 |
04.09.2010 |
21 |
503 |
24.0 |
50 (2007) |
| 51 |
Tuncay Özışık |
TÖ0 |
Staff |
10.09.1988 |
31.07.2002 |
14 |
506 |
36.1 |
65 (1990) |
| 52 |
Yüksel Karataş |
YK |
Staff |
09.11.1988 |
26.12.1999 |
12 |
289 |
24.1 |
52 (1990) |
| 53 |
Hülya Çalışkan |
HÇ0 |
Staff |
12.03.1990 |
28.09.1999 |
10 |
264 |
26.4 |
44 (1991) |
| 54 |
Tansel Ak |
TA |
Staff |
01.09.1990 |
24.08.2004 |
15 |
411 |
27.4 |
58 (1994) |
| 55 |
Tuba Koktay |
TK |
Staff |
02.10.1991 |
26.11.1996 |
6 |
86 |
14.3 |
28 (1993) |
| 56 |
Nurol Al |
NA |
Staff |
02.04.1992 |
02.09.2010 |
8 |
119 |
14.9 |
32 (1998) |
| 57 |
Ipek Hamami Cay |
ıH |
Staff |
22.08.1995 |
24.06.2008 |
14 |
353 |
25.2 |
50 (2007) |
| 58 |
Melahat Sırma |
MS |
Staff |
28.09.1995 |
27.07.2006 |
8 |
227 |
28.4 |
52 (2003) |
| 59 |
Taşkın Çay |
TÇ |
Staff |
12.10.1995 |
13.12.2006 |
12 |
350 |
29.2 |
42 (2001) |
| 60 |
Selçuk Bilir |
SB0 |
Staff |
02.11.1995 |
26.07.2009 |
12 |
348 |
29.0 |
44 (2001) |
| 61 |
Ali Kılçık |
AK0 |
Staff |
07.07.1999 |
04.11.2002 |
4 |
170 |
42.5 |
70 (2000) |
| 62 |
Zahide Funda Bostancı Güver |
ZFB |
Staff |
28.05.2001 |
26.12.2007 |
7 |
291 |
41.6 |
50 (2003) |
| 63 |
Tolga Güver |
TG |
Staff |
15.11.2002 |
06.01.2008 |
7 |
205 |
29.3 |
44 (2003) |
| 64 |
Sinan Aliş |
SA |
Staff |
03.02.2006 |
20.06.2016 |
11 |
312 |
28.4 |
44 (2007) |
| 65 |
Tolga Dinçer |
TD |
Staff |
08.03.2007 |
27.06.2007 |
1 |
14 |
14.0 |
14 (2007) |
| 66 |
Korhan Yelkenci active |
KY |
Staff |
04.02.2008 |
26.10.2026 |
19 |
671 |
35.3 |
67 (2014) |
| 67 |
Başar Coşkunoğlu |
BC |
Staff |
17.05.2010 |
24.02.2024 |
15 |
485 |
32.3 |
53 (2016) |
| 68 |
Asuman Gültekin Annak |
AG0 |
Staff |
03.08.2010 |
27.05.2015 |
6 |
290 |
48.3 |
69 (2011) |
| 69 |
Ozgecan Önal Taş |
ÖÖ |
Staff |
12.01.2012 |
28.09.2022 |
11 |
356 |
32.4 |
61 (2016) |
| 70 |
Orhan Güneş |
OG0 |
Staff |
02.07.2012 |
25.10.2013 |
2 |
51 |
25.5 |
31 (2013) |
| 71 |
Talar Yontan |
TY0 |
Staff |
04.11.2014 |
14.02.2023 |
10 |
379 |
37.9 |
60 (2016) |
| 72 |
Seda Kaptan |
SK0 |
Graduate student |
02.02.2017 |
26.06.2018 |
2 |
29 |
14.5 |
18 (2017) |
| 73 |
Süleyman Fişek active |
SF |
Staff |
03.02.2017 |
10.10.2026 |
10 |
320 |
32.0 |
60 (2024) |
| 74 |
Olcay Plevne |
OP |
Staff |
30.05.2018 |
02.08.2026 |
9 |
261 |
29.0 |
45 (2019) |
| 75 |
Burcu Akbulut |
BA |
Graduate student |
18.02.2019 |
30.05.2019 |
1 |
5 |
5.0 |
5 (2019) |
| 76 |
Burçin Tanık active |
BT |
Staff |
09.12.2019 |
12.10.2026 |
8 |
290 |
36.3 |
63 (2024) |
| 77 |
Oğuzhan Çakır |
OÇ |
Staff |
08.03.2020 |
29.06.2022 |
3 |
93 |
31.0 |
38 (2021) |
| 78 |
Ergün Ege |
EE |
Staff |
07.07.2020 |
20.06.2026 |
7 |
262 |
37.4 |
61 (2025) |
| 79 |
Emre Yılman active |
EY |
Staff |
01.01.2026 |
23.10.2026 |
1 |
45 |
45.0 |
45 (2026) |
| 80 |
İrem Özdemir |
İÖ |
Staff |
06.02.2026 |
29.06.2026 |
1 |
12 |
12.0 |
12 (2026) |
| 81 |
Yağız Altıkulaç |
YA |
Staff |
23.02.2026 |
22.06.2026 |
1 |
10 |
10.0 |
10 (2026) |
| 82 |
Tuğba Boztepe active |
TB |
Staff |
05.03.2026 |
24.09.2026 |
1 |
24 |
24.0 |
24 (2026) |
| 83 |
Melike Eryılmaz active |
ME |
Staff |
12.07.2026 |
22.10.2026 |
1 |
21 |
21.0 |
21 (2026) |
| 84 |
Sezer Özel active |
SÖ |
Graduate student |
24.10.2026 |
24.10.2026 |
1 |
1 |
1.0 |
1 (2026) |
| 85 |
Sibel Ötken active |
SÖT |
Graduate student |
25.10.2026 |
25.10.2026 |
1 |
1 |
1.0 |
1 (2026) |
Day counts are computed from the daily observation records (rasat_yapan, since 1951).
