GEARRS 3 Explanation of Comm Paths

0312-EX-CN-2019 Text Documents

Near Space Launch, Inc.

2019-07-02ELS_233295

Explanation of Communications Paths and Frequencies Requested
Exhibit for GEARRS-3 FCC Experimental Application 2019
The GEARRS-3 Cubesat, requests to use the following communications paths and frequencies.
Comm Paths
All of the comm paths for GEARRS-3 are via the Globalstar constellation; all paths are space to
space links, there are no space to ground or ground to space links to or from GEARRS-3.
Globalstar will file a companion license application, to license transmissions from satellites in
the Globalstar constellation, to GEARRS-3. That license application file number will be posted
as an exhibit to the GEARRS-3 license application, when the file number is known.
GEARRS-3 carries two EyeStar S3 Simplex transmitters, and two EyeStar D2 Duplex
transceivers, for communication with the Globalstar constellation. Each of these will transmit
only when the associated antenna is facing up, away from Earth.
Frequencies
The Simplex transmitters will transmit on the single frequency prescribed by Globalstar for
space use: Channel C, which is center frequency 1616.25 MHz.
The Duplex transceivers will transmit on one of the two channels prescribed by Globalstar for
space use: Channel 5, 1615.65 MHz, and Channel 6, 1616.88 MHz. Each of these channels is
listed in the application as a separate frequency.
The Duplex transceivers may receive on any of the 13 frequencies used by the Globalstar
constellation, as shown in the following table. The frequency is chosen by the Globalstar
satellite that is transmitting to a duplex radio on GEARRS-3.

Channel Frequency
1 2484.39
2 2485.62
3 2486.85
4 2488.08
5 2489.31
6 2490.54
7 2491.77
8 2493
9 2494.23
10 2495.46
11 2496.69
12 2497.92
13 2499.15

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Document Created: 2019-07-02 16:35:08
Document Modified: 2019-07-02 16:35:08

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