TB 9-4931-539-35
Station And
Call
Frequency
Type
Nominal Radiated
Location
Letters
(kHz)
Operation
Power (kW)
Maintenance Weekly Schedule
NRS(T)
NAA
24.0
MSK
1000
Mon. 1400 to 2359 UT
Cutler, ME
(universal time) (If holiday on
USA
Mon., maintenance will be
44 38' 50" N
performed on preceding Fri.)
67 15' 54" W
1200 to 2000 UT 2d and 4th
NCS Japan
NDT
17.4
MSK
200
1st Thurs. And Fri. Of month
Yosami, Japan
2300 to 0900 UT
34 58' 15" N
All others Thurs. And Fri. 2300
137 01' 18" E
to 0700 UT
NRS(T)
NLK
24.8
MSK
234
Thurs. 1600 to 2400 UT (During
Jim Creek, WA
daylight savings time)
USA
1500 to 2300 UT each Thurs.
48 12' 15" N
Scheduled off 2 Nov 1500 to 8
21 55' 00" W
Nov 2359 UT
NAVCAMS
NPM
23.4
MSK
600
1800 to 0400 UT last Wed. And
EASTPAC
Thurs. Of month
Laualualei, HI
1800 to 0200 UT all other Wed.
21 25' 30" N
And Thurs.
158 09' 20" W
NRTF
NSS
21.4
MSK
1000
1200 to 2000 UT
Annapolis, MD
Testing 2000 to 2200 UT Tues.,
USA
Operator training 1800 to 2000
38 59' 30" N
UT 2d and 4th Thurs.
NCS H.E. HOLT
NWC
22.3
MSK
1000
Mon. 000 to 0800 UT
NWC Australia
21 49' 01" S
114 09' 50" E
NIST
WWVB
60.0
VLF
15
No Scheduled Maintenance
BOULDER, CO
USA
Aquada P.R. NAU
NAU
28.5
MSK
100
1200 to 2000 Wed.
Rugby, England
GBR
16.0
FSK
750
1000 to 1400 UT Tues.
1May
be used if no DOD stations are available.
local standard is simple and straightforward. Any relative frequency error between the
local frequency standard and the received VLF carrier signal is observable as a phase
drift on the MICROSECONDS digital counter and on the strip chart recorder. The rate
of this phase drift can be directly interpreted as a fractional frequency error (FFE) in
the local standard. The FFE for observed phase changes over various elapsed time
intervals can be obtained using the conversion factors listed below:
