Радио честоти използвани в радио астрономията

През 1979г. на Световната административна радио конференция (WARC) на Международния съюз по далекосъобщения (ITU), са определени честотни диапазони за радиоастрономически наблюдения. Най-ниските два диапазона обикновено се използват за наблюдения на Слънцето и Юпитер; диапазоните 73, 150 и 406 MHz са доста популярни за търсене и наблюдение на пулсари, а диапазона 1400 MHz се използва за наблюдение на „водородната линия”.

• 13,36 – 13,41 MHz
• 25,55 – 25,67 MHz
• 73.00 – 74.60 MHz
• 150.05 – 153.00 MHz
• 406.10 – 410.00 MHz
• 1400.0 – 1427.0 MHz

На XXI-ото Генерално събрание на Международния астрономически съюз (IAU)
(Буенос Айрес, 23 юли – 1 август 1991) астрофизиците внимателно прегледали най-важните спектрални линии. IAU съставя списък на тези спектрални линии, съгласно таблицата по долу. IAU е инициирал необходимостта от защита на тези честотни диапозони от честотни и хармонични излъчвания, особено от космически предаватели.

Вещество	Substance	Честота	Защитен диапазон	Забележка 1)
Деутерий (DI)	Deuterium (DI)	327,384 MHz	327,00 – 327,70 MHz
Водород (HI)	Hydrogen (HI)	1420,406 MHz	1370,00 – 1427,00MHz	2) 3)
Хидроксилен радикал (ОН)	Hydroxyl radical (OH)	1612,231 MHz	1606,80 – 1613,80 MHz	3) 4)
Хидроксилен радикал (ОН)	Hydroxyl radical (OH)	1665,402 MHz	1659,80 – 1667,10 MHz	4)
Хидроксилен радикал (ОН)	Hydroxyl radical (OH)	1667,359 MHz	1661,80 – 1669,00 MHz	4)
Хидроксилен радикал (ОН)	Hydroxyl radical (OH)	1720,530 MHz	1714,80 – 1722,20 MHz	3) 4)
Метилидин (CH)	Methyladyne (CH)	3263,794 MHz	3252,90 – 3267,10 MHz	3) 4)
Метилидин (CH)	Methyladyne (CH)	3335,481 MHz	3324,40 – 3338,80 MHz	3) 4)
Метилидин (CH)	Methyladyne (CH)	3349,193 MHz	3338,00 – 3352,50 MHz	3) 4)
Формалдехид (H2CO)	Formaldehyde (H2CO)	4829,660 MHz	4813,60 – 4834,50 MHz	3) 4)
Метанол (СН2ОН)	Methanol (CH2OH)	6668,518 MHz	6661,80 – 6675,20 MHz	3) 6)
Изотоп на йонизиран хелий (3HeII)	Ionized Helium Isotope (3HeII)	8665,650 MHz	8660,00 – 8670,00 MHz
Метанол (СНЗОН)	Methanol (CH3OH)	12,178 GHz	12,17 – 12,19 GHz	3) 6)
Циклопропенилиден (C3H2)	Cyclopropenylidene (C3H2)	18,343 GHz	18,28 – 18,36 GHz	3) 4) 6)
Водна пара (H2O)	Water Vapour (H2O)	22,235 GHz	22,16 – 22,26 GHz	3) 4)
Амоняк (NH3)	Ammonia (NH3)	23,694 GHz	23,61 – 23,71 GHz	4)
Амоняк (NH3)	Ammonia (NH3)	23,723 GHz	23,64 – 23,74 GHz	4)
Амоняк (NH3)	Ammonia (NH3)	23,870 GHz	23,79 – 23,89 GHz	4)
Силициев монооксид (SiO)	Silicon monoxide (SiO)	42,519 GHz	42,47 – 42,57 GHz	3)
Силициев монооксид (SiO)	Silicon monoxide (SiO)	42,821 GHz	42,77 – 42,86 GHz
Силициев монооксид (SiO)	Silicon monoxide (SiO)	42,880 GHz	42,83 – 42,93 GHz
Силициев монооксид (SiO)	Silicon monoxide (SiO)	43,122 GHz	43,07 – 43,17 GHz
Силициев монооксид (SiO)	Silicon monoxide (SiO)	43,424 GHz	43,37 – 43,47 GHz
Въглероден моносулфид (CS)	Carbon monosulphide (CS)	48,991 GHz	48,94 – 49,04 GHz
Деутериев формилов катион (DCO +)	Deuterated formylium (DCO+)	72,039 GHz	71,96 – 72,11 GHz	3)
Силициев монооксид (SiO)	Silicon monoxide (SiO)	86,243 GHz	86,16 – 86,33 GHz
Формилов катион (H13CO +)	Formylium (H13CO+)	86,754 GHz	86,66 – 86,84 GHz
Силициев монооксид (SiO)	Silicon monoxide (SiO)	86,847 GHz	86,76 – 86,93 GHz
Ethynyl radical (С2Н)	Ethynyl radical (C2H)	87,300 GHz	87,21 – 87,39 GHz	5)
Циановодород (HCN)	Hydrogen cyanide (HCN)	88,632 GHz	88,34 – 88,72 GHz	4)
Формилов катион (HCO +)	Formylium (HCO+)	89,189 GHz	88,89 – 89,28 GHz	4)
Изоциановодород (HNC)	Hydrogen isocyanide (HNC)	90,664 GHz	90,57 – 90,76 GHz
Въглероден моносулфид (CS)	Carbon monosulphide (CS)	97,981 GHz	97,65 – 98,08 GHz	4)
Диазенилий (N2H)	Diazenylium (N2H)	93,174 GHz	93,07 – 93,27 GHz
Въглероден моносулфид (CS)	Carbon monosulphide (CS)	97,981 GHz	97,65 – 98,08 GHz	4)
Въглероден оксид (C18O)	Carbon monoxide (C18O)	109,782 GHz	109,67 – 109,89 GHz
Въглероден оксид (13CO)	Carbon monoxide (13CO)	110,201 GHz	109,83 – 110,31 GHz	4)
Въглероден оксид (C17O)	Carbon monoxide (C17O)	112,359 GHz	112,25 – 112,47 GHz	6)
Въглероден оксид (CO)	Carbon monoxide (CO)	115,271 GHz	114,88 – 115,39 GHz	4)
Формалдехид (H213CO)	Formaldehyde (H213CO)	137,450 GHz	137,31 – 137,59 GHz	3) 6)
Въглероден моносулфид (CS)	Carbon monosulphide (CS)	146,969 GHz	146,82 – 147,12 GHz
Водна пара (H2O)	Water vapour (H2O)	183,310 GHz	183,12 – 183,50 GHz
Въглероден оксид (C18O)	Carbon monoxide (C18O)	219,560 GHz	219,34 – 219,78 GHz
Въглероден оксид (13CO)	Carbon monoxide (13CO)	220,399 GHz	219,67 – 220,62 GHz	4)
Въглероден оксид (CO)	Carbon monoxide (CO)	230,538 GHz	229,77 – 230,77 GHz	4)
Въглероден моносулфид (CS)	Carbon monosulphide (CS)	244,953 GHz	244,72 – 245,20 GHz	6)
Циановодород (HCN)	Hydrogen cyanide (HCN)	265,886 GHz	265,62 – 266,15 GHz
Формилов катион (HCO +)	Formylium (HCO+)	267,557 GHz	267,29 – 267,83 GHz
Изоциановодород (HNC)	Hydrogen isocyanide (HNC)	271,981 GHz	271,71 – 272,25 GHz
Диазониеви съединения (N2H +)	Dyazenulium (N2H+)	279,511 GHz	279,23 – 279,79 GHz
Въглероден оксид (C18O)	Carbon monoxide (C18O)	312,330 GHz	329,00 – 329,66 GHz
Въглероден оксид (13CO)	Carbon monoxide (13CO)	330,587 GHz	330,25 – 330,92 GHz
Въглероден моносулфид (CS)	Carbon monosulphide (CS)	342,883 GHz	342,54 – 343,23 GHz
Въглероден оксид (CO)	Carbon monoxide (CO)	345,796 GHz	345,45 – 346,14 GHz
Циановодород (HCN)	Hydrogen cyanide (HCN)	354,484 GHz	354,13 – 354,84 GHz
Формилов катион (HCO +)	Formylium (HCO+)	356,734 GHz	356,37 – 357,09 GHz
Диазониеви съединения (N2H +)	Dyazenulium (N2H+)	372,672 GHz	372,30 – 373,05 GHz
Водна пара (H2O)	Water vapour (H2O)	380,197 GHz	379,81 – 380,58 GHz
Въглероден оксид (C18O)	Carbon monoxide (C18O)	439,088 GHz	438,64 – 439,53 GHz
Въглероден оксид (13CO)	Carbon monoxide (13CO)	440,765 GHz	440,32 – 441,21 GHz
Въглероден оксид (CO)	Carbon monoxide (CO)	461,041 GHz	460,57 – 461,51 GHz
Тежка вода (HDO) „полу-тежка вода“	Heavy water (HDO)	464,925 GHz	464,46 – 465,39 GHz
Въглерод (CI)	Carbon (CI)	492,162 GHz	491,66 – 492,66 GHz
Водна пара (H218O)	Water vapour (H218O)	547,676 GHz	547,13 – 548,22 GHz
Водна пара (H2O)	Water vapour (H2O)	556,936 GHz	556,37 – 557,50 GHz
Амоняк (15NH3)	Ammonia (15NH3)	572,113 GHz	571,54 – 572,69 GHz
Амоняк (NH3)	Ammonia (NH3)	572,498 GHz	571,92 – 573,07 GHz
Въглероден оксид (CO)	Carbon monoxide (CO)	691,473 GHz	690,78 – 692,17 GHz
Циановодород (HCN)	Hydrogen cyanide (HCN)	797,433 GHz	796,64 – 789,23 GHz
Формилов катион (HCO +)	Formylium (HCO+)	802,653 GHz	801,85 – 803,85 GHz
Въглероден оксид (CO)	Carbon monoxide (CO)	806,652 GHz	805,85 –807,46 GHz
Въглерод (CI)	Carbon (CI)	809,350 GHz	808,54 – 810,16 GHz

Забележки:

1. Ако забележка 2) или забележка 4) не са опоменати, диапазона на доплеровото отклонение на честотата, съответства на радиални скорости от +/- 300 km/s (съответстващи на излъчвания, които се среща в нашата галактика).
2. Необходимо е увеличаване на диапазона от към ниската честота от 1400 до 1427 MHz, за да се позволи доплеровото отклонение на HI (водородната линия), да бъде наблюдавано от далечните галактики.
3. Настоящото международно разпределение не е фиксирано в целия свят. За повече информация Виж: ITU-R Radio Regulations за по-подробна информация.
4. Тъй като тези честоти се използват и за наблюдение на други галактики, посочените честотни диапазони включват доплерови оклонения, съответстващи на скорости до 1000 km/s. Трябва да се отбележи, че HI „водородната линия” е наблюдавана при честоти на червеното изместване до 500 MHz, някои линии от най-разпространените молекули са открити в галактики със скорости до 50 000 km/s, което съответства на намаляване на честотата до 17%.
5. Има шест тясно разположени линии, свързани с тази молекула на тази честота. Изброената група е достатъчно широка, за да позволи наблюдение на всичките шест линии.
6. Този ред не е споменат в ITU-R Radio Regulations.

Допълнителен списък на важни спектрални линии в милиметровите вълни

При подготовката на Световната конференция по радиосъобщения 2000 г., WRC-2000, която преразглежда разпределението на честотите над 71 GHz, работната група е проучила всички известни преходи в милиметрови и субмилиметрови вълни. Те са избрали ограничен брой астрофизически линии (най-важните спектрални линии). Този списък допълва предишния.

Вещество	Честота		Защитен диапазон
Deuterium (DI)	327,348	MHz	327,00	–	327,70	MHz
Hydrogen (HI)	1420,406	MHz	1370,00	–	1427,00	MHz
Hydroxyl radical (OH)	1612,231	MHz	1606,80	–	1613,80	MHz
Hydroxyl radical (OH)	1665,402	MHz	1659,80	–	1667,10	MHz
Hydroxyl radical (OH)	1667,359	MHz	1661,80	–	1669,00	MHz
Hydroxyl radical (OH)	1720,530	MHz	1714,80	–	1722,20	MHz
Methyladyne (CH)	3263,794	MHz	3242,40	–	3267,10	MHz
Methyladyne (CH)	3335,481	MHz	3324,40	–	3338,80	MHz
Methyladyne (CH)	3349,193	MHz	3338,00	–	3352,50	MHz
Formaldehyde (H2CO)	4829,660	MHz	4813,60	–	4834,50	MHz
Methanol (CH3OH)	6668,518	MHz	6661,80	–	6675,20	MHz
Helium (3He+)	8665,650	MHz	8657,00	–	8674,30	MHz
Methanol (CH3OH)	12,178	GHz	12,17	–	12,19	GHz
Formaldehyde (H2CO)	14,488	GHz	14,44	–	14,50	GHz
Cyclopropenylidene (C3H2)	18,343	GHz	18,28	–	18,36	GHz
Cyclopropenylidene (C3H2)	21,587	GHz	21,56	–	21,61	GHz
Water vapor (H2O)	22,235	GHz	22,16	–	22,26	GHz
Dicarbon monosulphide (CCS)	22,344	GHz	22,32	–	22,37	GHz
Ammonia (NH3)	23,694	GHz	23,61	–	23,72	GHz
Ammonia (NH3)	23,723	GHz	23,64	–	23,75	GHz
Ammonia (NH3)	23,870	GHz	23,79	–	23,89	GHz
Ammonia (NH3)	24,139	GHz	24,11	–	24,16	GHz
Methanol (CH3OH)	36,169	GHz	36,13	–	36,21	GHz
Cyanoacetylene (HC3N)	36,392	GHz	36,36	–	36,43	GHz
Silicon monoxide (SiO)	42,519	GHz	42,47	–	42,57	GHz
Silicon monoxide (SiO)	42,821	GHz	42,77	–	42,86	GHz
Silicon monoxide (SiO)	42,880	GHz	42,83	–	42,93	GHz
Silicon monoxide (SiO)	43,122	GHz	43,07	–	43,17	GHz
Silicon monoxide (SiO)	43,424	GHz	43,37	–	43,47	GHz
Dicarbon monosulphide (CCS)	45,379	GHz	45,33	–	45,42	GHz
Cyanoacetylene (HC3N)	45,490	GHz	45,44	–	45,54	GHz
Carbon monosulphide (13CS)	46,247	GHz	46,20	–	46,29	GHz
Carbon monosulphide (C34S)	48,207	GHz	48,16	–	48,26	GHz
Carbon monosulphide (CS)	48,991	GHz	48,83	–	49,04	GHz
Oxygen (O2)	56,265	GHz	56,21	–	56,32	GHz
Oxygen (O2)	58,324	GHz	58,27	–	58,38	GHz
Oxygen (O2)	58,446	GHz	58,39	–	58,50	GHz
Oxygen (O2)	59,164	GHz	59,10	–	59,22	GHz
Oxygen (O2)	59,591	GHz	59,53	–	59,65	GHz
Oxygen (O2)	60,306	GHz	60,25	–	60,37	GHz
Oxygen (O2)	60,434	GHz	60,37	–	60,49	GHz
Oxygen (O2)	61,151	GHz	61,09	–	61,21	GHz
Oxygen (O2)	62,486	GHz	62,42	–	62,55	GHz
Deuterated formylium (DCO+)	72,039	GHz	71,97	–	72,11	GHz
Deuterium cyanide (DCN)	72,415	GHz	72,34	–	72,49	GHz
Cyanoacetylene (HC3N)	72,784	GHz	72,71	–	72,86	GHz
Methyl cyanide (CH3CN)	73,590	GHz	73,51	–	73,66	GHz
Deuterated water (HDO)	80,578	GHz	80,50	–	80,66	GHz
Cyanoacetylene (HC3N)	81,881	GHz	81,80	–	81,96	GHz
Cyclopropenylidene (C3H2)	82,966	GHz	82,88	–	83,05	GHz
Cyclopropenylidene (C3H2)	85,339	GHz	85,05	–	85,42	GHz
Methyl acetylene (CH3CCH)	85,500	GHz	85,41	–	85,59	GHz
Deuterated Ammonia (NH2D)	85,926	GHz	85,84	–	86,01	GHz
Hydrogen cyanide (HC15N)	86,055	GHz	85,97	–	86,14	GHz
Silicon monoxide (SiO)	86,243	GHz	86,16	–	86,33	GHz
Hydrogen cyanide (H13CN)	86,340	GHz	86,25	–	86,43	GHz
Formylium (H13CO+)	86,754	GHz	86,67	–	86,84	GHz
Hydrogen isocyanide (HN13C)	87,091	GHz	87,00	–	87,18	GHz
Silicon monoxide (SiO)	86,847	GHz	86,76	–	86,93	GHz
Ethynyl radical (C2H)	87,300	GHz	87,21	–	87,39	GHz
Hydrogen cyanide (HCN)	88,632	GHz	88,34	–	88,72	GHz
Hydrogen isocyanide (H15NC)	88,866	GHz	88,78	–	88,95	GHz
Formylium (HCO+)	89,189	GHz	88,89	–	89,28	GHz
Hydrogen isocyanide (HNC)	90,664	GHz	90,57	–	90,75	GHz
Cyanoacetylene (HC3N)	90,979	GHz	90,89	–	91,07	GHz
Methyl cyanide (CH3CN)	91,980	GHz	91,88	–	92,07	GHz
Carbon monosulphide (13CS)	92,494	GHz	92,40	–	92,59	GHz
Diazenylium (N2H+)	93,174	GHz	93,08	–	93,27	GHz
Carbon monosulphide (C34S)	96,413	GHz	96,32	–	96,51	GHz
Carbon monosulphide (CS)	97,981	GHz	97,65	–	98,08	GHz
Sulphur monoxide (SO)	99,300	GHz	99,20	–	99,40	GHz
Cyanoacetylene (HC3N)	100,076	GHz	99,98	–	100,18	GHz
Methyl acetylene (CH3CCH)	102,500	GHz	102,39	–	102,60	GHz
Cyanoacetylene (HC3N)	109,174	GHz	109,06	–	109,28	GHz
Sulphur monoxide (SO)	109,252	GHz	109,14	–	109,36	GHz
Carbon monoxide (C18O)	109,782	GHz	109,67	–	109,89	GHz
Deuterated Ammonia (NH2D)	110,153	GHz	110,04	–	110,26	GHz
Carbon monoxide (13CO)	110,201	GHz	119,83	–	110,31	GHz
Methyl cyanide (CH3CN)	110,380	GHz	110,27	–	110,49	GHz
Carbon monoxide (C17O)	112,359	GHz	112,25	–	112,47	GHz
Cyano radical (CN)	113,500	GHz	113,39	–	113,61	GHz
Carbon monoxide (CO)	115,271	GHz	114,88	–	115,39	GHz
Oxygen (O2)	118,750	GHz	118,63	–	118,87	GHz
Silicon monoxide (SiO)	127,269	GHz	127,14	–	127,40	GHz
Formaldehyde (H213CO)	137,450	GHz	137,31	–	137,59	GHz
Carbon monosulphide (13CS)	138,739	GHz	138,60	–	138,88	GHz
Formaldehyde (H2CO)	140,840	GHz	140,69	–	140,98	GHz
Deuterated formylium (DCO+)	144,077	GHz	143,93	–	144,22	GHz
Deuterium cyanide (DCN)	144,828	GHz	144,68	–	144,97	GHz
Formaldehyde (H2CO)	145,603	GHz	145,45	–	145,75	GHz
Carbon monosulphide (CS)	146,969	GHz	146,48	–	147,12	GHz
Methyl cyanide (CH3CN)	147,170	GHz	147,02	–	147,32	GHz
Nitric oxide (NO)	150,400	GHz	149,95	–	150,85	GHz
Formaldehyde (H2CO)	150,498	GHz	150,35	–	150,65	GHz
Methyl acetylene (CH3CCH)	153,800	GHz	153,64	–	153,95	GHz
Cyanoacetylene (HC3N)	154,657	GHz	154,50	–	154,81	GHz
Cyanoacetylene (HC3N)	163,753	GHz	163,59	–	163,92	GHz
Hydrogen sulphide (H2S)	168,760	GHz	168,59	–	168,93	GHz
Silicon monoxide (SiO)	173,688	GHz	173,51	–	173,86	GHz
Water vapor (H2O)	183,310	GHz	183,13	–	183,49	GHz
Carbon monosulphide (CS)	195,954	GHz	195,30	–	196,15	GHz
Water vapor (H218O)	203,132	GHz	202,93	–	203,34	GHz
Sulphur monoxide (SO)	206,176	GHz	205,97	–	206,38	GHz
Sulphur monoxide (SO)	215,221	GHz	215,01	–	215,44	GHz
Deuterated formylium (DCO+)	216,113	GHz	215,90	–	216,33	GHz
Silicon monoxide (SiO)	217,105	GHz	216,89	–	217,32	GHz
Deuterium cyanide (DCN)	217,239	GHz	217,02	–	217,46	GHz
Formaldehyde (H2CO)	218,222	GHz	218,00	–	218,44	GHz
Carbon monoxide (C18O)	219,560	GHz	219,34	–	219,78	GHz
Carbon monoxide (13CO)	220,399	GHz	219,67	–	220,62	GHz
Methyl cyanide (CH3CN)	220,700	GHz	220,48	–	220,92	GHz
Sulphur dioxide (SO2)	221,965	GHz	221,74	–	222,19	GHz
Methyl acetylene (CH3CCH)	222,100	GHz	221,87	–	222,32	GHz
Carbon monoxide (C17O)	224,714	GHz	224,49	–	224,94	GHz
Sulphur dioxide (SO2)	225,154	GHz	224,93	–	225,38	GHz
Deuterated water (HDO)	225,897	GHz	225,67	–	226,12	GHz
Cyano radical (CN)	226,600	GHz	226,37	–	226,83	GHz
Cyano radical (CN)	226,800	GHz	226,57	–	227,03	GHz
Carbon monoxide (CO)	230,538	GHz	229,77	–	230,77	GHz
Carbon monosulphide (13CS)	231,221	GHz	230,99	–	231,45	GHz
Carbon monosulphide (C34S)	241,016	GHz	240,77	–	241,26	GHz
Deuterated water (HDO)	241,562	GHz	241,32	–	241,80	GHz
Methanol (CH3OH)	241,700	GHz	241,46	–	241,94	GHz
Methanol (CH3OH)	241,767	GHz	241,53	–	242,01	GHz
Methanol (CH3OH)	241,791	GHz	241,55	–	242,03	GHz
Methanol (CH3OH)	241,842	GHz	241,60	–	242,08	GHz
Carbon monosulphide (CS)	244,953	GHz	244,14	–	245,20	GHz
Nitric oxide (NO)	250,600	GHz	250,35	–	250,85	GHz
Sulphur dioxide (SO2)	251,211	GHz	250,96	–	251,46	GHz
Methyl cyanide (CH3CN)	257,500	GHz	257,24	–	257,76	GHz
Hydrogen cyanide (H13CN)	259,012	GHz	258,75	–	259,27	GHz
Formylium (H13CO+)	260,255	GHz	259,99	–	260,52	GHz
Silicon monoxide (SiO)	260,518	GHz	260,26	–	260,78	GHz
Hydrogen isocyanide (HN13C)	261,263	GHz	261,00	–	261,52	GHz
Ethynyl radical (C2H)	262,000	GHz	261,74	–	262,26	GHz
Sulphur dioxide (SO2)	262,334	GHz	262,07	–	262,60	GHz
Hydrogen cyanide (HCN)	265,886	GHz	265,00	–	266,15	GHz
Formylium (HCO+)	267,557	GHz	266,66	–	267,82	GHz
Hydrogen isocyanide (HNC)	271,981	GHz	271,71	–	272,25	GHz
Carbon monosulphide (13CS)	277,455	GHz	277,18	–	277,73	GHz
Diazenylium (N2H+)	279,511	GHz	279,23	–	279,79	GHz
Carbon monosulphide (C34S)	289,209	GHz	288,92	–	289,50	GHz
Sodium hydride (NaH)	289,860	GHz	289,57	–	290,15	GHz
Carbon monosulphide (CS)	293,912	GHz	292,93	–	294,21	GHz
Hydronium (H3O+)	307,192	GHz	306,88	–	307,50	GHz
Carbon monosulphide (13CS)	323,685	GHz	323,36	–	324,01	GHz
Water vapor (H2O)	325,153	GHz	324,83	–	325,48	GHz
Heavy water (HDO)	313,750	GHz	313,44	–	314,06	GHz
Carbon monoxide (C18O)	329,330	GHz	329,00	–	329,66	GHz
Carbon monoxide (13CO)	330,587	GHz	329,49	–	330,92	GHz
Carbon monosulphide (C34S)	337,397	GHz	337,06	–	337,73	GHz
Cyano radical (CN)	340,030	GHz	339,69	–	340,37	GHz
Cyano radical (CN)	340,250	GHz	339,91	–	340,59	GHz
Carbon monosulphide (CS)	342,883	GHz	341,74	–	343,23	GHz
Hydrogen cyanide (HC15N)	344,200	GHz	343,86	–	344,54	GHz
Magnesium hydride (MgH)	344,305	GHz	343,96	–	344,65	GHz
Hydrogen cyanide (H13CN)	344,340	GHz	344,00	–	344,68	GHz
Carbon monoxide (CO)	345,796	GHz	344,64	–	346,14	GHz
Formylium (H13CO+)	346,999	GHz	346,65	–	347,35	GHz
Silicon monoxide (SiO)	347,331	GHz	346,98	–	347,68	GHz
Ethynyl radical (C2H)	349,340	GHz	348,99	–	349,69	GHz
Ethynyl radical (C2H)	349,390	GHz	349,04	–	349,74	GHz
Hydrogen cyanide (HCN)	354,484	GHz	353,30	–	354,84	GHz
Formylium (HCO+)	356,734	GHz	355,54	–	357,09	GHz
Hydrogen isocyanide (HNC)	362,630	GHz	362,27	–	362,99	GHz
Hydronium (H3O+)	364,797	GHz	364,43	–	365,16	GHz
Oxygen (O2)	368,498	GHz	368,13	–	368,87	GHz
Carbon monosulphide (13CS)	369,908	GHz	369,54	–	370,28	GHz
H2D+	372,421	GHz	372,05	–	372,79	GHz
Diazenylium (N2H+)	372,672	GHz	372,30	–	373,04	GHz
Water vapor (H2O)	380,197	GHz	379,82	–	380,58	GHz
Carbon monosulphide (C34S)	385,578	GHz	385,19	–	385,96	GHz
Hydronium (H3O+)	388,459	GHz	388,07	–	388,85	GHz
Water vapor (H218O)	390,608	GHz	390,22	–	391,00	GHz
Silicon monoxide (SiO)	390,728	GHz	390,34	–	391,12	GHz
Carbon monosulphide (CS)	391,847	GHz	390,54	–	392,24	GHz
Hydronium (H3O+)	396,272	GHz	395,88	–	396,67	GHz
Carbon monosulphide (13CS)	416,123	GHz	415,71	–	416,54	GHz
Oxygen (O2)	424,763	GHz	424,34	–	425,19	GHz
Hydrogen cyanide (H13CN)	431,660	GHz	431,23	–	432,09	GHz
Carbon monosulphide (C34S)	433,751	GHz	433,32	–	434,19	GHz
Silicon monoxide (SiO)	434,120	GHz	433,69	–	434,55	GHz
Carbon monoxide (C18O)	439,088	GHz	438,65	–	439,53	GHz
Water vapor (H2O)	439,151	GHz	438,71	–	439,59	GHz
Carbon monoxide (13CO)	440,765	GHz	439,30	–	441,21	GHz
Carbon monosulphide (CS)	440,803	GHz	439,33	–	441,24	GHz
Hydrogen cyanide (HCN)	443,123	GHz	441,65	–	443,57	GHz
Lithium hydride (LiH)	443,957	GHz	443,51	–	444,40	GHz
Water vapor (H2O)	448,001	GHz	447,55	–	448,45	GHz
Hyrogen Sulphide (H2S)	452,390	GHz	451,94	–	452,84	GHz
Hydrogen isocyanide (HNC)	453,270	GHz	452,82	–	453,72	GHz
Carbon monoxide (CO)	461,041	GHz	459,50	–	461,50	GHz
Carbon monosulphide (13CS)	462,331	GHz	461,87	–	462,79	GHz
NH2	462,400	GHz	461,94	–	462,86	GHz
Heavy water (HDO)	464,925	GHz	464,46	–	465,39	GHz
NH2	469,300	GHz	468,83	–	469,77	GHz
Water vapor (H2O)	474,689	GHz	474,21	–	475,16	GHz
Silicon monoxide (SiO)	477,503	GHz	477,03	–	477,98	GHz
Heavy water (HDO)	479,947	GHz	479,47	–	480,43	GHz
Heavy water (HDO)	481,780	GHz	481,30	–	482,26	GHz
Carbon monosulphide (C34S)	481,916	GHz	481,43	–	482,40	GHz
Oxygen (O2)	487,249	GHz	486,76	–	487,74	GHz
Water vapor (H218O)	489,054	GHz	488,56	–	489,54	GHz
Carbon monosulphide (CS)	489,751	GHz	488,12	–	490,24	GHz
Heavy water (HDO)	490,597	GHz	490,11	–	491,09	GHz
Carbon (CI)	492,162	GHz	490,52	–	492,65	GHz
Carbon monosulphide (13CS)	508,528	GHz	508,02	–	509,04	GHz
Heavy water (HDO)	509,292	GHz	508,78	–	509,80	GHz
Hydrogen cyanide (H13CN)	517,970	GHz	517,45	–	518,49	GHz
Silicon monoxide (SiO)	520,878	GHz	520,36	–	521,40	GHz
Carbon monosulphide (C34S)	530,071	GHz	529,54	–	530,60	GHz
Hydrogen cyanide (HCN)	531,716	GHz	529,94	–	532,25	GHz
Methylidyne (CH)	532,700	GHz	532,17	–	533,23	GHz
SiH2	536,600	GHz	536,06	–	537,14	GHz
Methylidyne (CH)	536,800	GHz	536,26	–	537,34	GHz
Carbon monosulphide (CS)	538,689	GHz	536,89	–	539,23	GHz
Hydrogen isocyanide (HNC)	543,897	GHz	543,35	–	544,44	GHz
Water vapor (H218O)	547,676	GHz	547,13	–	548,22	GHz
Carbon monoxide (13CO)	550,926	GHz	549,09	–	551,48	GHz
Carbon monosulphide (13CS)	554,715	GHz	554,16	–	555,27	GHz
Water vapor (H2O)	556,936	GHz	556,38	–	557,49	GHz
Silicon monoxide (SiO)	564,244	GHz	563,68	–	564,81	GHz
Ammonia (15NH3)	572,113	GHz	571,54	–	572,69	GHz
Ammonia (NH3)	572,498	GHz	571,93	–	573,07	GHz
SiH2	575,800	GHz	575,22	–	576,38	GHz
Carbon monoxide (CO)	576,268	GHz	574,35	–	576,84	GHz
Carbon monosulphide (C34S)	578,216	GHz	577,64	–	578,79	GHz
Sodium Hydride (NaH)	579,480	GHz	578,90	–	580,06	GHz
Carbon monosulphide (CS)	587,616	GHz	587,03	–	588,20	GHz
Heavy water (HDO)	599,927	GHz	599,33	–	600,53	GHz
Carbon monosulphide (13CS)	600,889	GHz	600,29	–	601,49	GHz
Hydrogen cyanide (H13CN)	604,268	GHz	603,66	–	604,87	GHz
Silicon monoxide (SiO)	607,599	GHz	606,99	–	608,21	GHz
Hydrogen cyanide (HCN)	620,304	GHz	618,24	–	620,92	GHz
Water vapor (H2O)	620,700	GHz	620,08	–	621,32	GHz
Heavy water (HDO)	622,483	GHz	621,86	–	623,11	GHz
Silicon hydride (SiH)	624,900	GHz	624,27	–	625,53	GHz
Hydrogen chloride (HCl)	625,040	GHz	624,41	–	625,67	GHz
Hydrogen chloride (HCl)	625,980	GHz	625,35	–	626,61	GHz
Carbon monosulphide (C34S)	626,349	GHz	625,72	–	626,98	GHz
Silicon hydride (SiH)	627,700	GHz	627,07	–	628,33	GHz
Hydrogen isocyanide (HNC)	634,510	GHz	633,88	–	635,14	GHz
Carbon monosulphide (CS)	636,532	GHz	634,41	–	637,17	GHz
Carbon monosulphide (13CS)	647,050	GHz	646,40	–	647,70	GHz
H2D+	648,337	GHz	647,69	–	648,99	GHz
Silicon monoxide (SiO)	650,944	GHz	650,29	–	651,60	GHz
Carbon monoxide (13CO)	661,067	GHz	658,86	–	661,73	GHz
Carbon monosulphide (C34S)	674,470	GHz	673,80	–	675,14	GHz
Carbon monosulphide (CS)	685,435	GHz	683,15	–	686,12	GHz
Magnesium hydride (MgH)	687,100	GHz	686,41	–	687,79	GHz
Magnesium hydride (MgH)	687,900	GHz	687,21	–	688,59	GHz
Hydrogen cyanide (H13CN)	690,268	GHz	689,58	–	690,96	GHz
Carbon monoxide (CO)	691,473	GHz	689,17	–	692,16	GHz
Carbon monosulphide (13CS)	693,195	GHz	692,50	–	693,89	GHz
Silicon monoxide (SiO)	694,275	GHz	693,58	–	694,97	GHz
Hydrogen cyanide (HCN)	708,877	GHz	708,17	–	709,59	GHz
Oxygen (O2)	715,393	GHz	714,68	–	716,11	GHz
Carbon monosulphide (C34S)	722,577	GHz	721,85	–	723,30	GHz
Hydrogen isocyanide (HNC)	725,107	GHz	724,38	–	725,83	GHz
Carbon monosulphide (CS)	734,324	GHz	733,59	–	735,06	GHz
Silicon monoxide (SiO)	737,594	GHz	736,86	–	738,33	GHz
Carbon monosulphide (13CS)	739,324	GHz	738,58	–	740,06	GHz
Water vapor (H218O)	745,320	GHz	744,57	–	746,07	GHz
Water vapor (H2O)	752,033	GHz	751,28	–	752,79	GHz
Heavy water (HDO)	753,411	GHz	752,66	–	754,16	GHz
Carbon monosulphide (C34S)	770,669	GHz	769,90	–	771,44	GHz
Oxygen (O2)	773,840	GHz	773,07	–	774,61	GHz
Hydrogen cyanide (H13CN)	776,819	GHz	776,04	–	777,60	GHz
Silicon monoxide (SiO)	780,594	GHz	779,81	–	781,38	GHz
Carbon monosulphide (CS)	783,199	GHz	782,42	–	783,98	GHz
Carbon monosulphide (13CS)	785,434	GHz	784,65	–	786,22	GHz
Hydrogen cyanide (HCN)	797,433	GHz	794,77	–	798,23	GHz
Formylium (HCO+)	802,653	GHz	799,98	–	803,46	GHz
Carbon monoxide (CO)	806,652	GHz	803,96	–	807,46	GHz
Carbon (CI)	809,350	GHz	806,65	–	810,16	GHz
Hydrogen isocyanide (HNC)	815,684	GHz	812,96	–	816,50	GHz
Carbon monosulphide (C34S)	818,745	GHz	817,93	–	819,56	GHz
Silicon monoxide (SiO)	824,186	GHz	823,36	–	825,01	GHz
Carbon monosulphide (13CS)	831,523	GHz	830,69	–	832,36	GHz
Carbon monosulphide (CS)	832,057	GHz	829,28	–	832,89	GHz
Oxygen (O2)	834,146	GHz	833,31	–	834,98	GHz
Methylidinium (CH+)	835,070	GHz	834,23	–	835,91	GHz
Hydrogen cyanide (H13CN)	863,069	GHz	862,21	–	863,93	GHz
Carbon monosulphide (C34S)	866,804	GHz	865,94	–	867,67	GHz
Sulpher hydride (SH)	866,900	GHz	866,03	–	867,77	GHz
Silicon monoxide (SiO)	867,457	GHz	866,59	–	868,33	GHz
Sulpher hydride (SH)	875,200	GHz	874,32	–	876,08	GHz
Carbon monosulphide (13CS)	877,591	GHz	876,71	–	878,47	GHz
Carbon monosulphide (CS)	880,899	GHz	877,96	–	881,78	GHz
Carbon monoxide (13CO)	881,273	GHz	878,33	–	882,15	GHz
Hydrogen cyanide (HCN)	885,977	GHz	883,02	–	886,86	GHz
Lithium hydride (LiH)	886,500	GHz	885,61	–	887,39	GHz
Formilium (HCO+)	891,558	GHz	888,59	–	892,45	GHz
Heavy water (HDO)	893,639	GHz	892,74	–	894,53	GHz
Hydrogen isocyanide (HNC)	906,239	GHz	905,33	–	907,15	GHz
Silicon monoxide (SiO)	910,710	GHz	909,80	–	911,62	GHz
Carbon monosulphide (C34S)	914,844	GHz	913,93	–	915,76	GHz
Water vapor (H2O)	916,172	GHz	915,26	–	917,09	GHz
Heavy water (HDO)	919,310	GHz	918,39	–	920,23	GHz
Carbon monoxide (CO)	921,800	GHz	918,72	–	922,72	GHz
Carbon monosulphide (13CS)	923,633	GHz	922,71	–	924,56	GHz
Carbon monosulphide (CS)	929,723	GHz	926,62	–	930,65	GHz
Hydrogen cyanide (H13CN)	949,299	GHz	948,35	–	950,25	GHz
Silicon monoxide (SiO)	953,943	GHz	952,99	–	954,90	GHz
H3+	955,000	GHz	954,04	–	955,96	GHz
Carbon monosulphide (C34S)	962,865	GHz	961,90	–	963,83	GHz
Carbon monosulphide (13CS)	969,649	GHz	968,68	–	970,62	GHz
Water vapor (H2O)	970,315	GHz	969,34	–	971,29	GHz
Nitrogen hydride (NH)	974,479	GHz	973,50	–	975,45	GHz
Hydrogen cyanide (HCN)	974,488	GHz	971,24	–	975,46	GHz
Carbon monosulphide (CS)	978,529	GHz	977,55	–	979,51	GHz
Formilium (HCO+)	983,925	GHz	980,64	–	984,91	GHz
Heavy water (HDO)	984,138	GHz	983,15	–	985,12	GHz
Hydronium (H3O+)	984,697	GHz	983,71	–	985,68	GHz
Water vapor (H2O)	987,927	GHz	986,94	–	988,92	GHz
Water vapor (H218O)	994,634	GHz	993,64	–	995,63	GHz
Heavy water (HDO)	995,412	GHz	994,42	–	996,41	GHz
Hydrogen isocyanide (HNC)	996,771	GHz	995,77	–	997,77	GHz
Silicon monoxide (SiO)	997,155	GHz	996,16	–	998,15	GHz

КАК Е В БЪЛГАРИЯ?

  Съгласно  чл. 8.  на закона за електронните съобщения, Министерският съвет по предложение на Съвета по националния радиочестотен спектър приема Национален план за разпределение на радиочестотния спектър и го обнародва в “Държавен вестник“.

           Според забележка № 88 на Национален план за разпределение на радиочестотния спектър към ДВ бр. 47 от 2018г., са забранени всички излъчвания в следните радиочестотни ленти за нуждите на радиоастрономията:

1400-1427 MHz,

2690-2700 MHz,

10.68-10.7 GHz,

15.35-15.4 GHz,

23.6-24 GHz,

31.3-31.5 GHz,

48.94-49.04 GHz от бордови станции,

50.2-50.4 GHz,

52.6-54.25 GHz,

86-92 GHz,

100-102 GHz,

109.5-111.8 GHz,

114.25-116 GHz,

148.5-151.5 GHz,

164-167 GHz,

182-185 GHz,

190-191.8 GHz,

200-209 GHz,

226-231.5 GHz,

250-252 GHz.

Според забележка № 87 на Национален план за разпределение на радиочестотния спектър към ДВ бр. 47 от 2018г., при назначения на честоти от долните радиочестотни ленти за станции от радиослужби, различни от радиоастрономическата, би следвало да се предприемат необходимите практически приложими мерки за защита на радиоастрономическата радиослужба от вредни смущения.

13360-13410 kHz, 25550-25670 kHz, 37.5-38.25 MHz, 73-74.6 MHz, 150.05-153 MHz, 322-328.6 MHz, 406.1-410 MHz, 608-614 MHz, 1330-1400 MHz, 1610.6-1613.8 MHz, 1660-1670 MHz, 1718.8-1722.2 MHz, 2655-2690 MHz, 3260-3267 MHz, 3332-3339 MHz, 3345.8-3352.5 MHz, 4825-4835 MHz,

4950-4990 MHz, 4990-5000 MHz, 6650-6675.2 MHz, 10.6-10.68 GHz, 14.47-14.5 GHz, 22.01-22.21 GHz, 22.21-22.5 GHz, 22.81-22.86 GHz, 23.07-23.12 GHz, 31.2-31.3 GHz, 31.5-31.8 GHz, 36.43-36.5 GHz, 42.5-43.5 GHz, 42.77-42.87 GHz, 43.07-43.17 GHz, 43.37-43.47 GHz, 48.94-49.04 GHz, 76-86 GHz,

92-94 GHz 94.1-100 GHz, 102-109.5 GHz, 111.8-114.25 GHz, 128.33-128.59 GHz, 129.23-129.49 GHz, 130-134 GHz, 136-148.5 GHz, 151.5-158.5 GHz, 168.59-168.93 GHz, 171.11-171.45 GHz, 172.31-172.65 GHz, 173.52-173.85 GHz, 195.75-196.15 GHz, 209-226 GHz, 241-250 GHz, 252-275 GHz.

Източници на информация:

www.iau.org

www.setileague.org/articles/protectd.htm

www.craf.eu/iau-list-of-important-spectral-lines/

www.authorea.com/users/90294/articles/107865-special-frequencies-in-radio-astronomy/_show_article

www.crc.bg/files/_bg/Freq_plan_2018_BG-1_03092018.doc