Spectrum
Spectrum
LEGEND: (Commercial SATCOM)
CAPITALIZED NAMES = Fixed Satellite Service (FSS)
lower case names = Mobile Satellite Service (MSS)/ Personal Comm Services (PCS)
MILSTAR
DSCS
GBS
ACTS
Space-Ground Link System (SGLS)
DSCS
inmarsat, iridium, globalstar,
ellipso
ico, ellipso,
globalstar
INTELSAT
INTELSAT,
GE
TELEDESIC, SPACEWAY, ASTROLINK, SKYBRIDGE,
iridium (inter-satellite &
gateway links)
TELEDESIC, SPACEWAY, ASTROLINK,
CYBERSTAR, SKYBRIDGE,
iridium (inter-satellite & gateway links)
Com’l.
L
Com’l.
S
Com’l.
C
Com’l.
Ku
Com’l.
Ka
1.53-
1.55
1.61-
1.65
1.98-
2.1
2.4-
2.5
3.9
6.3
12
14
1.761-1.842 GHz downlinks
2.200-2.290 GHz uplinks
7.25-7.75 GHz
7.9-8.4 GHz
19.2-20.2 GHz
29-30 GHz
20.2- 21.2 GHz
Milstar
& GBS
30-31 GHz
43-45 GHz
27.5
30
L1:
1.57542
GHz
L2:
1.22760
GHz
Global
Positioning
System (GPS)
ACTS
“regular” cellular
(Land Mobile Radio)
800
900
Com’l.
UHF
UHF SATCOM users are
subject to interference
from terrestrial UHF users, who have higher international regulatory priority.
SGLS frequencies are at risk from international & US commercial encroachment.
Heavy orbital/terrestrial
congestion requires much coordination with terrestrial microwave link users.
Advanced
Communications
Technology Satellite
(ACTS)
= ‘At-Risk’ bands currently sought
for commercial satellite use, with
potential for U.S. or international
spectrum reallocation
137-
138
148-
150
Com’l.
VHF
Military
Air/Ground
Radios
138-144 MHz
orbcomm
EHF
3
GHz
30
GHz
UHF
SHF
300
MHz
1GHz
110
GHz
L
S
X
W
C
V
135-170 MHz
400-600 MHz
1.5-2.0 GHz
12-18 GHz
27-30 GHz
40-45 GHz
Ka
Ku
K