Sec. 101.21  Technical content of applications.

    Applications, except FCC Form 175, must contain all technical 
information required by the application form and any additional 
information necessary to fully describe the proposed facilities and to 
demonstrate compliance with all technical requirements of the rules 
governing the radio service involved (see subparts C, F, G, I, J, and L 
of this part, as appropriate). The following paragraphs describe a 
number of technical requirements.
    (a) Each application proposing a new or modified antenna structure 
for a station (including a receive-only or passive repeater) must 
indicate whether the owner has registered the structure with the 
Commission. Complete information as to rules concerning the 
registration, construction, marking and lighting of antenna structures 
is contained in part 17 of this chapter. See also Sec. 101.121 if the 
structure is used by more than one station.
    (b) Each application for construction permit for a developmental 
authorization must be accompanied by pertinent supplemental information 
as required by Sec. 101.411 in addition to such information as may be 
specifically required by this section.
    (c) An applicant proposing construction of one or more new stations 
or modification of existing stations must submit the location and 
telephone number (if known) of the maintenance center for a fixed 
microwave system. In lieu of providing the location and telephone number 
of the maintenance center(s) on a case by case basis, a licensee may 
file a complete list for all operational stations with the Commission 
and the Engineer-In-Charge of the appropriate radio district on an 
annual basis or at more frequent intervals as necessary to keep the 
information current.
    (d) Each application in the Private Operational Fixed Point-to-Point 
Microwave, Common Carrier Fixed Point-to-Point Microwave, Local 
Television Transmission, and Digital Electronic Message Services 
(excluding user stations) proposing a new or replacement antenna 
(excluding omnidirectional antennas) must include an antenna radiation 
pattern showing the antenna power gain distribution in the horizontal 
plane expressed in decibels, unless such pattern is known to be on file 
with the Commission in which case the applicant

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may reference in its application the FCC-ID number that indicates that 
the pattern is on file with the Commission.
    (e) Each application in the Private Operational Fixed Point-to-Point 
Microwave Service and the Common Carrier Fixed Point-to-Point Microwave 
Service must include the following information:

Applicant's name and address.
Transmitting station name.
Transmitting station coordinates.
Frequencies and polarizations to be added, changed or deleted.
Transmitting equipment type, its stability, actual output power, 
emission designator, and type of modulation (loading).
Transmitting antenna type(s), model, gain, and, if required, a radiation 
pattern provided or certified by the manufacturer.
Transmitting antenna center line height(s) above ground level and ground 
elevation above mean sea level.
Receiving station name.
Receiving station coordinates.
Receiving antenna type(s), model, gain, and, if required, a radiation 
pattern provided or certified by the manufacturer.
Receiving antenna center line height(s) above ground level and ground 
elevation above mean sea level.
Path azimuth and distance.
Estimated transmitter transmission line loss expressed in dB.
Estimated receiver transmission line loss expressed in dB.

    Note: The position location of antenna sites shall be determined to 
an accuracy of no less than &177;1 second in the horizontal 
dimensions (latitude and longitude) and &177;1 meter in the 
vertical dimension (ground elevation) with respect to the National 
Spacial Reference System.

    (f) All applicants for regular authorization must, before filing an 
application, amendments to a pending application, or modifications to a 
license, prior coordinate the proposed frequency usage with existing 
users in the area and other applicants with previously filed 
applications in accordance with the procedures in Sec. 101.103. In those 
frequency bands shared with the communication-satellite service, an 
applicant for a new station, for new points of communication, for the 
initial frequency assignment in a shared band for which coordination has 
not been previously effected, or for authority to modify the emission or 
radiation characteristics of an existing station in a manner that may 
increase the likelihood of harmful interference, must ascertain in 
advance whether the station(s) involved lie within the great circle 
coordination distance contours of an existing Earth station or one for 
which an application has been accepted for filing, and must coordinate 
his proposal with each such Earth station operator or applicant. For 
each potential interference path, the applicant must perform the 
computations required to determine that the expected level of 
interference to or from the terrestrial station does not exceed the 
maximum permissible interference power level in accordance with the 
technical standards and requirements of Secs. 25.251-25.256 of this 
chapter. The Commission may, in the course of examining any application, 
require the submission of additional showings, complete with pertinent 
data and calculations in accordance with part 25 of this chapter, 
showing that harmful interference will not likely result from the 
proposed operation. (Technical characteristics of the Earth stations on 
file and coordination contour maps for those Earth stations will be kept 
on file for public inspection in the offices of the Commission's 
International Bureau in Washington, DC)
    (g) Each application in the Local Multipoint Distribution Service 
must contain all technical information required by FCC Form 600 and any 
other applicable form or associated Public Notices and by any applicable 
rules in this part.
[ 61 FR 26677 , May 28, 1996, as amended at  62 FR 23164 , Apr. 29, 1997]