TABLE C.1 The Most Important Spectral Lines Below 275 GHz

Substance

Formula

Frequency (GHz)

Suggested Minimum Band (GHz)

Band Allocation Status1

Deuterium

D I

0.327384

0.327-0.3277

P

Hydrogen

HI

1.4204062,3

1.370-1.427

S 1.33-1.40

 

 

 

 

P 1.40-1.427

Hydroxyl radical

OH

1.6122314,5

1.6068-1.6138

P 1.6106-1.6138

 

 

1.6654026

1.6598-1.6671

P 1.66-1.67

 

 

1.6673596

1.6618-1.6690

 

Hydroxyl radical

OH

1.7205303,6

1.7148-1.7222

S 1.7188-1.7222

Methyladyne

CH

3.2637943,6

3.2424-3.2671

S 3.260-3.267

 

 

3.3354813,6

3.3244-3.3388

S 3.332-3.339

 

 

3.3491933,6

3.3380-3.3525

S 3.3458-3.3525

Formaldehyde

H2CO

4.8296603,6

4.8136-4.8345

S 4.8-4.9

Methanol

CH3OH

6.6685183,7

6.6618-6.6752

S 6.650-6.6752

Helium

3He+

8.665650

8.6570-8.6743

 

Methanol

CH3OH

12.1783,8

12.17-12.19

 

Formaldehyde

H2CO

14.4883,6

14.44-14.50

S 14.47-14.50

Cyclopropenylidene

C3H2

18.3433,6,8

18.28-18.36

 

Water vapor

H2O

22.2353,6

22.16-22.26

F 22.01-22.21

 

 

 

 

P 22.21-22.50

Dicarbon monosulphide

CCS

22.344

22.32-22.37

 

Ammonia

NH3

23.6946

23.61-23.89

P 23.60-24.00

 

 

23.7236

23.8706

 

Sulphur monoxide

SiO

30.002

29.97-30.03

 

Methanol

CH3OH

36.169

36.13-36.21

P9 36-37

Silicon monoxide

SiO

42.519

42.47-42.57

 

 

 

42.821

42.78-42.86

F 42.77-42.87

 

 

43.122

43.08-43.17

F 43.07-43.17

 

 

43.424

43.38-43.47

F 43.37-43.37

Dicarbon monosulphide

CCS

45.379

45.33-45.42

 

Carbon monosulphide

CS

48.991

48.94-49.04

P 48.94-49.04

Oxygen

O2

61.1

56.21-63.06

P10 58.2-59.0

Deuterated water

HDO

80.578

80.50-80.66

 

Cyclopropenylidene

C3H2

85.339

85.05-85.42

 

Silicon monoxide

SiO

86.243

86.16-86.33

P

Formylium

H13CO+

86.754

86.67-86.84

P

Silicon monoxide

SiO

86.847

86.76-86.93

P

Ethynyl radical

C2H

87.30011

87.21-87.39

P



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement