80
C. Maccone
Radar-frequency bands according to IEEE standard
[7]
Band
designation
Frequency
range
Explanation of meaning of letters
HF
0.003 to
0.03 GHz
High Frequency
[8]
VHF
0.03 to 0.3 GHz
Very High Frequency
[8]
UHF
0.3 to 1 GHz
Ultra High Frequency
[8]
L
1 to 2 GHz
Long wave
S
2 to 4 GHz
Short wave
C
4 to 8 GHz
Compromise between S and X
X
8 to 12 GHz
Used in WW II for fire control, X for cross (as
in crosshair). Exotic.
Ku
12 to 18 GHz
Kurz-under
K
18 to 27 GHz
Kurz (German for "short")
Ka
27 to 40 GHz
Kurz-above
V
40 to 75 GHz
W
75 to 110 GHz
W follows V in the alphabet
mm or
G
110 to 300 GHz
[note 1]
Millimeter
Fig. 8.4 Radio frequency bands according to IEEE standards
Figure 8.4 shows the IEEE radar bands. Frequency bands in the microwave range
are designated by letters. This convention began around World War 2 with military designations for frequencies used in radar, which was the first application
of microwaves. Unfortunately there are several incompatible naming systems for
microwave bands, and even within a given system the exact frequency range designated by a letter varies somewhat between different application areas. One widely
used standard is the IEEE radar bands established by the US Institute of Electrical
and Electronic Engineers.
8.4 Queqiao and Chang’e 4 Communications Bands Above
the Moon Farside
Please look at Fig. 8.5, summarizing well the telecommunications involved with the
Chang’e 4 and Queqiao spacecrafts, as well as with the rover exploring the Farside
(taken from the Planetary Society website https://www.planetary.org/multimedia/
space-images/spacecraft/change-4-mission.html).
It plainly appears that only the S, X and UHF bands are involved in the whole
mission. No other bands are involved at all. In particular, the L band, crucial to
SETI searches, is basically not involved, except for the UHF band used by the rover
communicate with the lander, that should have a modest power (unknown to this
author at the moment). Thus, had we radio telescope nowadays working inside crater
C. Maccone
Radar-frequency bands according to IEEE standard
[7]
Band
designation
Frequency
range
Explanation of meaning of letters
HF
0.003 to
0.03 GHz
High Frequency
[8]
VHF
0.03 to 0.3 GHz
Very High Frequency
[8]
UHF
0.3 to 1 GHz
Ultra High Frequency
[8]
L
1 to 2 GHz
Long wave
S
2 to 4 GHz
Short wave
C
4 to 8 GHz
Compromise between S and X
X
8 to 12 GHz
Used in WW II for fire control, X for cross (as
in crosshair). Exotic.
Ku
12 to 18 GHz
Kurz-under
K
18 to 27 GHz
Kurz (German for "short")
Ka
27 to 40 GHz
Kurz-above
V
40 to 75 GHz
W
75 to 110 GHz
W follows V in the alphabet
mm or
G
110 to 300 GHz
[note 1]
Millimeter
Fig. 8.4 Radio frequency bands according to IEEE standards
Figure 8.4 shows the IEEE radar bands. Frequency bands in the microwave range
are designated by letters. This convention began around World War 2 with military designations for frequencies used in radar, which was the first application
of microwaves. Unfortunately there are several incompatible naming systems for
microwave bands, and even within a given system the exact frequency range designated by a letter varies somewhat between different application areas. One widely
used standard is the IEEE radar bands established by the US Institute of Electrical
and Electronic Engineers.
8.4 Queqiao and Chang’e 4 Communications Bands Above
the Moon Farside
Please look at Fig. 8.5, summarizing well the telecommunications involved with the
Chang’e 4 and Queqiao spacecrafts, as well as with the rover exploring the Farside
(taken from the Planetary Society website https://www.planetary.org/multimedia/
space-images/spacecraft/change-4-mission.html).
It plainly appears that only the S, X and UHF bands are involved in the whole
mission. No other bands are involved at all. In particular, the L band, crucial to
SETI searches, is basically not involved, except for the UHF band used by the rover
communicate with the lander, that should have a modest power (unknown to this
author at the moment). Thus, had we radio telescope nowadays working inside crater