34 Contents

Volume 34 / C o n t e n t s
1.	*Igor Shibaev, Aleksandr Shibaev* DEPENDENCE OF THE GLEISBERG CYCLE PERIOD ON THE LENGTH OF WOLF'S NUMBERS SERIES DOI: https://doi.org/10.3897/arb.v34.e01	5
2.	*Georgi Jelev, Petar Dimitrov, Eugenia Roumenina* WITHIN-FIELD MAPPING OF WINTER WHEAT BIOPHYSICAL VARIABLES USING MULTISPECTRAL IMAGES FROM UAV DOI: https://doi.org/10.3897/arb.v34.e02	13
3.	*Zlatomir Dimitrov* POLARIMETRIC ANALYSIS OF ALOS PALSAR DATA (POL-SAR) OVER TEST AREAS IN NORTH-WEST BULGARIA – POLARIMETRIC DESCRIPTORS, DECOMPOSITIONS AND CLASSIFICATIONS DOI: https://doi.org/10.3897/arb.v34.e03	29
4.	Rositsa Miteva, Todor Kunchev, Svetoslav Zabunov, Garo Mardirossian, Roxandra Pamukoff-Michelson IONIZING RADIATION SENSOR FOR NANOSATELLITES, MICRODRONES AND SMALL UNMANNED GROUND VEHICLES DOI: https://doi.org/10.3897/arb.v34.e04	56
5.	*Svetoslav Zabunov* DIGITAL SIGNAL PROCESSING IN RADIOSOLARIZ PROJECT USING SSE2 DOI: https://doi.org/10.3897/arb.v34.e05	66
6.	*Konstantin Metodiev* DESIGN OF A FLAP FOR STRAIGHT WING OF UNMANNED AERIAL VEHICLE DOI: https://doi.org/10.3897/arb.v34.e06	72
7.	*Pavel Penev, Nikolay Zagorski* AEROSPACE SYSTEMS "AERIAL LAUNCH" AT THE MODERN STAGE DOI: https://doi.org/10.3897/arb.v34.e07	80
8.	*Dimitar Jordanov, Nikolay Zagorski, Stanislav Tsholakov* ROLE OF POWER RESERVE IN PARALLEL HYDRAULIC MOVEMENTS OF AIRCRAFT CONTROLS DOI: https://doi.org/10.3897/arb.v34.e08	95
9.	*Pavlin Gramatikov* SIMULATION AND MODELS OF ONBOARD SECONDARY POWER SOURCES FOR AERO AND SPACE DEVICES DOI: https://doi.org/10.3897/arb.v34.e09	106
10.	*Pavlin Gramatikov, Rumen Nedkov , Raicho Todorov* SYSTEMS FOR SECONDARY ELECTRIC POWER SUPPLY OF THE INSTRUMENTS "ZORA" AND "NEUROLAB-B" – SPACE MEDICINE DOI: https://doi.org/10.3897/arb.v34.e10	116
11.	*Kolyo Kolev, Angel Tanev* IDENTIFYING BATCH PROBLEMS IN AIRCRAFT FIELD RELIABILITY ANALYSIS DOI: https://doi.org/10.3897/arb.v34.e11	130
12.	*Milen Atanasov* MATHEMATICAL MODEL FOR OPERATION OF AVIATION SYSTEMS FOR DELIVERY OF SPECIAL MEANS TO AIR AND EARTH OBJECTS DOI: https://doi.org/10.3897/arb.v34.e12	138
13.	*Stoyko Stoykov* COMPARATIVE ANALYSIS OF THE ACCURACY OF BOMB RELEASE AND THE PROBABILITY CHARACTERISTICS OF THE ERROR OF BOMBING OF DIFFERENT METHODS SOLVING THE PROBLEM OF AIMING DOI: https://doi.org/10.3897/arb.v34.e13	149
14.	*Anna Bouzekova-Penkova, Silviya Simeonova* AFM ANALYSIS OF ALUMINIUM ALLOY 7075 DOI: https://doi.org/10.3897/arb.v34.e14	157
15.	*Anna Bouzekova-Penkova, Adelina Miteva* SOME AEROSPACE APPLICATIONS OF 7075 (B95) ALUMINIUM ALLOY DOI: https://doi.org/10.3897/arb.v34.e15	165
16.	*Georgi Jelev* INVENTOR AND INNOVATIVE WORK AT THE SPACE RESEARCH AND TECHNOLOGY INSTITUTE – BULGARIAN ACADEMY OF SCIENCES DOI: https://doi.org/10.3897/arb.v34.e16	180
17.	*Aleksandar Milanov* CHALLENGES IN INTERNATIONAL RESEARCH ON CELESTIAL BODIES. THE PROSPECTS OF THE BULGARIAN SPACE POLICY DOI: https://doi.org/10.3897/arb.v34.e17	187