Project Description

0867-EX-CN-2017 Pre Coordination Document

University of Colorado

2017-12-27ELS_202714

December 27, 2017 FCC Office of Engineering and Technology 445 12th Street SW Washington, DC 20554 SUBJECT: CSIM cubesat mission (FCC application # 0867-EX-CN-2017) Mr. Behnam Ghaffari, Please find details on the CSIM cubesat mission included below. Date license is required: March 1st, 2018 LV integration date: May 1st, 2018 Launch date: SSO-A July 1st, 2018 Date for initiation of on-orbit operations: July 1st, 2018 Expected mission duration: 24 months Principle Investigator for the mission. Point of Contact Name: Erik Richard Organization Name: University of Colorado Address: 1234 Innovation Dr., Boulder, CO E-Mail: erik.richard@lasp.Colorado.edu Telephone Number: 303-735-6629 Technical point of contact for the mission. Point of Contact Name: Rick Kohnert Organization Name: University of Colorado Address: 1234 Innovation Dr., Boulder, CO E-Mail: kohnert@colorado.edu Telephone Number: 303-492-6804 *please also include Erik Richard on any relevant communications. Point of contact who can terminate ALL satellite transmissions if interference is detected. Point of Contact Name: Rick Kohnert Organization Name: University of Colorado Address: 1234 Innovation Dr., Boulder, CO E-Mail: kohnert@colorado.edu Telephone Number: 303-492-6804 *please also include Erik Richard on any relevant communications. Point of contact who can terminate ALL Boulder CO ground station transmissions if interference is detected. Point of Contact Name: Rick Kohnert Organization Name: University of Colorado Address: 1234 Innovation Dr., Boulder, CO

E-Mail: kohnert@colorado.edu Telephone Number: 303-492-6804 *please also include Erik Richard on any relevant communications. Point of contact who can terminate ALL Fairbanks AK ground station transmissions if interference is detected. Point of Contact Name: Rick Kohnert Organization Name: University of Colorado Address: 1234 Innovation Dr., Boulder, CO E-Mail: kohnert@colorado.edu Telephone Number: 303-492-6804 *please also include Erik Richard on any relevant communications. Point of contact for conjunction alerts. Point of Contact Name: Rick Kohnert Organization Name: University of Colorado Address: 1234 Innovation Dr., Boulder, CO E-Mail: kohnert@colorado.edu Telephone Number: 303-492-6804 *please also include Erik Richard on any relevant communications. Project Description The primary objective of CSIM (Compact Solar Irradiance Monitor) is to measure the solar spectral irradiance (SSI) from 200 – 2400 nm with an SI-traceable absolute calibration at better than 0.2% uncertainty. The radiative energy from the Sun establishes the basic climate of the Earth’s surface and atmosphere. The SSI measurement is fundamental to interpreting how the Earth responds to solar variability, identifying the physical mechanisms of response, and validating climate model sensitivity to spectrally varying solar force. Presently, significant uncertainties in the difference between the SSI observations and model simulation on the solar-cycle timescales precludes our ability to fully establish the impact of long-term spectral variability on wavelength-dependent atmospheric and climate processes. In addition, because of the limited lifespan of sensors, long data sets require the linking of multiple sensor data into a continuous data record. By following the traditional high-cost, long lifetime mission approach to measuring the SSI, the solar data record is at risk of measurement gaps, increasing the historical uncertainty. As a low-cost, rapid turnaround mission, CSIM aims to show that the difficult SSI measurement can be accomplished by a small (30x20x10 cm) instrument. CSIM will operationally prove new technology advancements and is expected to improve upon the accuracy of traditional missions and reduce the risk of data record gaps. Once commissioned CSIM will operate viewing the sun when not in eclipse and downlinking in the S-band (2400-2405MHz) over our Boulder ground station. License Details The CSIM mission will utilize a SpaceQuest TRXU UHF radio operating a half-duplex uplink and downlink at 437.250MHz. This frequency has been coordinated with the IARU (see attached coordination letter). CSIM will also include a Blue Canyon Technologies

SDR-S S-band radio that will be used as a data transmitter nominally operating at 2Mbps. We are requesting a 47 CFR Part 5 - EXPERIMENTAL RADIO SERVICE license for our command uplink and telemetry downlink at 437.250MHz. For the science data downlink, we are requesting to operate our data downlink at 2402MHz in the ISM band. Additional data required for applications requesting use of federal or shared government frequencies. Spacecraft: CSIM Non-geostationary satellite Inclination: 97.7o Apogee: 575 km Perigee: 575 km Orbital period: 1.60h Number of satellites in the system: 1 Number of transmitting satellites: 1 Number of transmitting satellites: 1 Transmitter #1 (UHF) Center Frequency: 437.250MHz Bandwidth: 30kHz 3dB beamwidth: 300o Maximum Antenna Gain: 1dBi Polarization: Linear Maximum transmit power: 5W Modulation: GMSK ITU emission designator: 30K0G2DAX Transmitter #1 (S-band) Center Frequency: 2402 MHz Bandwidth: 2MHz 3dB beamwidth: 80o Maximum Antenna Gain: 6dBi Polarization: RCP Maximum transmit power: 3.2W Modulation: BPSK ITU emission designator: 2M00G2DAX Receiver #1 (UHF) Center Frequency: 437.250MHz Bandwidth: 30kHz

3dB beamwidth: 300o Maximum Antenna Gain: 1dBi Polarization: Linear Receiver Sensitivity: -110dBm Modulation: GMSK ITU emission designator: 30K0G2DAX Ground Station #1: Boulder, CO 80309 40°00'31.6"N, 105°14'51.0"W Altitude above MSL [m]: 1588 Antenna height above ground [m] : 3 above roof top. Elevation: 5-90o (min V00 for UHF and V10 for S-Band) Azimuth: 0-360o Transmitter #1 (UHF) Center Frequency: 437.250MHz Bandwidth: 30kHz 3dB beamwidth: 21o Maximum Antenna Gain: 21dBi Polarization: RCP Maximum transmit power: 500W Modulation: GMSK ITU emission designator: 30K0G2DAX Receiver #1 (UHF) Center Frequency: 437.250MHz Bandwidth: 30kHz 3dB beamwidth: 21o Maximum Antenna Gain: 21dBi Polarization: RCP Receiver Sensitivity: -110 dBm Modulation: GMSK ITU emission designator: 30K0G2DAX Receiver #2 (S-band) Center Frequency: 2402MHz Bandwidth: 2MHz 3dB beamwidth: 2.1o Maximum Antenna Gain: 38dBi Polarization: RCP

Receiver Sensitivity: -110dBm Modulation: BPSK ITU emission designator: 2K00G2DAX Ground Station #2: Fairbanks, AK 99709 64°47'39.14"N 147°43'10.91"W Altitude above MSL [m]: 142 Antenna height above ground [m] : 5.5m Elevation: 5-90o (min V05) Azimuth: 0-360o Transmitter #1 (UHF) Center Frequency: 437.250MHz Bandwidth: 30kHz 3dB beamwidth: 21o Maximum Antenna Gain: 18dBi Polarization: RCP Maximum transmit power: 500W Modulation: GMSK ITU emission designator: 30K0G2DAX Receiver #1 (UHF) Center Frequency: 437.250MHz Bandwidth: 30kHz 3dB beamwidth: 21o Maximum Antenna Gain: 18dBi Polarization: RCP Receiver Sensitivity: -110 dBm Modulation: GMSK ITU emission designator: 30K0G2DAX


Document Created: 2017-12-27 11:22:27
Document Modified: 2017-12-27 11:22:27
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