Electronic Filing
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MB E-Filing Site
These FCC/MB forms MUST be electronically filed:
FCC Forms 301, 301-CA, 302-CA, 302-FM, 302-DTV, 302-TV, 303-S, 314,
315, 316, 318, 319, 323, 323-E, 337, 340, 346, 347, 349,
350, 381
EEO Forms 395-A and 395-B have been suspended by
Commission Order FCC 01-34.
CDBS Users Guide or call (202)-418-2662
CDBS System Status
Call Sign Reservations & Authorizations
for broadcast
station call signs
Antenna Structure Registration via ULS
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Easy, one-stop access to all online U.S. Federal Government resources
www.USA.gov
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Local Sunrise / Sunset Calculations
Given a set of coordinates (latitude and longitude) in degrees / minutes /
seconds, this program will calculate the approximate average monthly
sunrise and sunset times at that location. These values are important to
those AM stations who must reduce power, cease operations, or change
to directional operation during the nighttime hours, as well as the stations
protected by the changed operation. (See Why AM Radio Stations Must
Reduce Power, Change Operations, or Cease Operations at Night for more
explanation.) The coordinates (latitude and longitude) for a specific AM
station may be retrieved from the AM Query.
In the program below, you may select the U.S. time zone in which you are
interested. For example, a listener may want to know when a particular
daytime-only AM station in the next time zone will cease
operation for the night. That person would enter the coordinates of the
station, his time zone, into this program and receive the answer.
AM licensees should be aware that local sunrise / sunset times specified on
AM radio station authorizations issued by the FCC will be made using STANDARD
time (NOT advanced or daylight savings time). This program, however, will
allow computations with advanced or Daylight Savings Time (1 hour ahead of
Standard Time).
This program does not have sufficient data to calculate local times for
latitudes above 60° North Latitude (i.e., northern Alaska or Canada),
or east of 63° West Longitude, or at any locations for South Latitude or
East Longitude.
Many AM broadcast radio stations operate with presunrise authority (PSRA)
or postsunset authority (PSSA). These special authorizations allow the
station to incrementally change power or mode of operation
before sunrise or after sunset, in recognition that changes in the ionosphere
(the atmospheric layer that reflects AM signals at night) do not occur
instantly at nightfall or at sunrise. For these
stations, the times shown by this program will generally indicate when the
incremental station changes must begin.
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