Environmental Assessment

0222-EX-CN-2018 Text Documents

Insitu

2018-03-07ELS_206033

                       Environmental Assessment

Per CFR 47, section 1.1307.b(1), Table 1, all applications for experimental operations
with an ERP greater than 100 watts require evaluation for compliance with human
exposure limits defined in section 1.1310, and if exceeded require submission of an
Environmental Assessment as defined in section 1.1311.

The below calculations define the minimum safe working distance for both Occupational
and General Public, which are based on the maximum permissible exposure limits of 5
mW/cm2 and 1 mW/cm2 respectively. These calculations were conducted using the
highest gain antenna used in this operation.

 TX Peak Power (mW)                25000000.00
 TX Peak Power (dBm)                     73.98
 Maximum Antenna Gain dBi                31.00
 EIRP (dBm)                             104.98
 Maximum Duty Cycle (Dc)                  1.00

 EIRP Watts                        31473135.29
 Avg EIRP Watts                    31473135.29

 TX Avg Power mW (Pavg)
 Pp*Dc                             25000000.00

 Non Dimensional Antenna
 Gain
 Gt = 10dBi/10                     1258.925412
                                  Occupational              General Public
 Minimum Safe Distance -
 Meters                                     225                                  510

 Distance in Centimeters (R)             22500                                 51000

 AVG Power Density
 mW/CmCm
 Pd At distance=R
 (Pavg*Gt)/(4*Pi)*R2               4.947264254                          0.962919081


                       Environmental Assessment

 TX Peak Power (mW)                  1000000.00
 TX Peak Power (dBm)                      60.00
 Maximum Antenna Gain dBi                 26.10
 EIRP (dBm)                               86.10
 Maximum Duty Cycle (Dc)                   1.00

 EIRP Watts                           407380.28
 Avg EIRP Watts                       407380.28

 TX Avg Power mW (Pavg)
 Pp*Dc                               1000000.00

 Non Dimensional Antenna
 Gain
 Gt = 10dBi/10                      407.3802778
                                   Occupational              General Public
 Minimum Safe Distance -
 Meters                                     25.5                                  59.5

 Distance in Centimeters (R)               2550                                   5950

 AVG Power Density
 mW/CmCm
 Pd At distance=R
 (Pavg*Gt)/(4*Pi)*R2                4.985512105                           0.915706305

The antenna will be onboard the aircraft in flight. Only authorized occupational workers
will be allowed access to the area of operation. In addition the transmitter will be secured
prior to conducting maintenance, and the area will be monitored during the operation to
ensure that personnel are clear of any radiation hazard area.



Document Created: 2018-03-07 08:49:24
Document Modified: 2018-03-07 08:49:24

© 2025 FCC.report
This site is not affiliated with or endorsed by the FCC