Long-term measurements onboard aircraft

Long-term measurements onboard aircraft of Czech airlines with Liulin detectors have been performed since 2001. Two models of Liulin have been used: MDU5 in 2001, 2002, 2005, 2006, 2007, and 2008, and since 2009 MDU6. Liulin was mounted onboard Airbus A310-300 in the cabin.

Spectra of energy deposited to its silicon diode were recorded in 5 or 10-min intervals during a flight. After several weeks of operation (usually 48 days for MDU5 and 69 days for MDU6), the device was removed, data from its memory were transferred to a computer and the absorbed dose, DSi, and ambient dose equivalent, H*(10), were calculated.

Navigation data, such as altitude, latitude, and longitude have been provided by Czech airlines.

Flights were directed from Prague to destinations with vertical cut-off rigidities ranging from 1 GV to 17 GV.

Aircraft routes

The list of all runs performed so far are summarized in the table below.


Run Start (yyyy/mm/dd) End (yyyy/mm/dd) Number of flights
1 2001/03/22 2001/05/07 108
2 2001/05/30 2001/07/25 105
3 2001/08/29 2001/10/18 96
4 2001/10/24 2001/12/12 70
5 2002/05/06 2002/06/28 116
6 2002/10/16 2002/12/04 103
7 2005/05/05 2005/06/26 95
8 2005/06/30 2005/08/23 174
9 2005/08/23 2005/12/31 223
10 2006/02/23 2006/04/14 111
11 2006/04/14 2006/05/29 85
12 2006/06/09 2006/07/26 65
13 2006/07/26 2006/09/17 155
14 2006/09/22 2006/11/10 76
15 2007/01/18 2007/03/04 66
16 2007/03/09 2007/04/23 56
17 2007/04/23 2007/06/14 81
18 2007/06/14 2007/07/26 69
19 2007/10/02 2007/11/22 83
20 2007/11/28 2008/01/09 50
21 2008/08/15 2008/09/22 74
22 2009/05/19 2009/06/23 54
23 2009/06/23 2009/08/31 102
24 2009/08/31 2009/11/13 89
25 2009/12/04 2010/02/05 43
26 2010/02/05 2010/04/16 46
27 2010/08/18 2010/10/06 186
28 2010/11/25 2011/02/03 328
29 2011/02/09 2011/04/08 213
30 2011/04/15 2011/07/03 298
31 2011/08/09 2011/10/18 279