EXPERIMENTAL STATION FREQUENCY COORDINATION REQUEST
☐ Tick here if this space station is also planned for amateur-satellite service operation.
Administrative information:
0
0a
0b
DOCUMENT CONTROL
Date submitted
Document version number (start at
zero and increment with each
revised request)
1
1a
1b
1c
1d
SPACECRAFT (published)
Name before launch
Proposed name after launch
Country of license.
Contact information at your
licensing authority.
3/19/2014
0.0
SNAPS- Stanford Nano Picture Satellite
SNAPS- Stanford Nano Picture Satellite
United States
American Radio Relay League [ARRL]
Address: 225 Main Street, Newington, CT 06111-1494
Tel: +1 (860) 594-0200 <HQ>
Fax: +1 (860) 594-0259 <HQ>
September 2014
6 months
1e
1f
Planned launch date
Planned mission duration
2
2a
2b
2c
2d
2e
LICENSEE OF THE SPACE STATION (published)
Representative’s first (given) name Andrew
Representative’s (family) name
Kalman
Call Sign
KK6AMQ
Postal address
PO Box 20144
Telephone number (including
(1) 415-336-4684
country code)
Representative e-mail address: our aek@stanford.edu
single point of contact who will
receive all correspondence
Skype name (if available)
aekalman
List names and e-mail addresses
David Gerson, dtgerson@stanford.edu, Andrew Ow,
of additional people (up to three)
Andrew.ow@gsb.stanford.edu- SNAPS Team Leads
who should receive copies of
correspondence.
2f
2g
2h
Space station information:
3
3a
SPACE STATION (published)
Mission(s).
The main goal of the SNAPS mission is photograph
Rev. 8.6 4 MAR 2013
Experimental Station Frequency Coordination Request — Page
Describe in detail what the space
station is planned to do. Use as
much space as you need.
3c
Proposed space station
transmitting frequency1 plan.
List for each frequency band:
è
MHz)
2
other CubeSats in orbit and autonomously select the
best image to return to Earth. This will be
accomplished by taking a high definition (HD) video
with an onboard camera. A computer vision algorithm
will randomly select frames from the video and
autonomously select the best image to beacon down
to Earth using a bent folded dipole antenna.
435-438 MHz
Output Power: 10 Watts
ITU emission designator: 5M00N0D
Omni-directional gain
Passive Magnetic stabilization, no active stabilization
-438
è ITU emission designator2,3
è common description of the
emission4
è antenna gain and pattern5
è attitude stabilisation, if used6
3d
Proposed space station
receiving frequency7 plan.
List for each frequency band:
435-438 MHz
half duplex
ITU emission designator: 5M00N0D
Omni-directional gain
è frequency band
è
ITU emission designator
è common description of the
emission
è noise temperature
è associated antenna gain and
pattern
1
Show all frequencies numerically in Hz, kHz, MHz, or GHz. Letter band designations are not used.
ITU emission designators are defined in Appendix I to the radio regulations. Effect of Doppler shift is
NOT included when determining bandwidth.
3 If using a frequency changing transponder, indicate the transmitting bandwidth. Effect of Doppler shift is
NOT included when determining bandwidth.
4 Common emission description means terms like transponder, NBFM, PSK31, 1200 baud packet (AFSK
on FM), etc.
5 Common patterns include omnidirectional, unidirectional (with a pattern).
6 Unstabilized is a tumbler. Stabilized can be passive magnetic, spinner, three axis, gravity gradient, etc.
7 Show all frequencies numerically in Hz, kHz, MHz, or GHz. Letter band designations are not used.
2
Rev. 8.6 4 MAR 2013
Experimental Station Frequency Coordination Request — Page
4
4a
3
TELECOMMAND (NOT published)
Telecommand frequency plan.
All communication happens on a single 435Mhz
frequency in a half-duplex manner. ITU emissions
List:
designator: 5M00N0D. Radio emission power of 10
Watts into a passive omnidirectional antenna (zero
è space station telecommand
gain). Downlink will occur over a 9600 bps link with
frequency bands,
JPEG format.
è ITU emission designator(s)
è common description of the
emission
è link power budget(s)
è a very general description of
any cipher system8
4b
Positive space station transmitter
control.
Explain how telecommand stations
will turn off the space station
transmitter(s) immediately, even in
the presence of user traffic and/or
space station computer system
failure.
NOTE: Transmitter turn off control
from the ground is absolutely
required. Software control is
useful, but does not substitute for
telecommand.
Good engineering practice is to
make telecommand independent
of all other systems.
4c
Be sure to read the paper:
Controlling Space Station
Transmitters.
Telecommand stations.
List all telecommand stations.
Sufficient Earth telecommand
stations must be arranged before
launch to insure that can be
terminated immediately. See RR
Positive space station transmitter control has been
implemented at the CDH and power system level.
The ground stations will send a message to the
spacecraft which tells it to shut off the radio. This
command will require a radio power reset to ensure
the radio enters its default state (not transmitting just
receiving). If the space station computer experiences
a failure and thus CD&H system is dead, then there
will be no packets sent to the radio and it will not
transmit. The ground stations have the capability to
command CD&H to stop sending transmit messages.
SSDL Ground Station, Durand, Stanford Campus
Contact- Andrew Kalman, aek@stanford.edu
8
Any means of preventing unauthorized telecommand of the space station. Recommended, but not
required.
Rev. 8.6 4 MAR 2013
Experimental Station Frequency Coordination Request — Page
4
22.1 and #3 of the terms and
conditions above.
5
5a
5b
5c
Launch plans (published)
Launch agency
Launch location
Planned orbit.
Include planned orbit apogee,
perigee, inclination, and period.
Include plans for orbit changes.
5d
List other satellites expected to
share the same launch. Update
when more information becomes
available.
Aerojet and Sandia National Lab- Super Strypi
Kauai, Hawaii
SNAPS would be placed in a sun-synchronous orbit at
400 km, with apogee around 450 and perigee around
350 km, an inclination of 98 degrees, and an orbital
period of 90 minutes. We expect SNAPS to be
operational by October 1st, 2014.
At this time we are not sure what satellite will share
our launch.
Earth station information:
6
6a
6b
7
7a
7b
Typical Earth station — transmitting (published)
Describe a typical telecommand
Directional yagi antenna, software defined radio,
station.
satellite tracking software, ground station software for
collecting signal and later interpreting it (e.g. CarpSD)
Link power budget.
See Annex
Show complete link budgets for all
Earth station transmitting
frequency bands.
Typical Earth station — receiving (published)
Describe a typical Earth station to
Directional yagi antenna, software defined radio,
receive signals from the planned
satellite tracking software, ground station software for
satellite.
collecting signal and later interpreting it (e.g. CarpSD)
Link power budget.
See Annex
Show complete link budgets for all
Earth station receiving frequency
bands.
Additional information:
Do not attach large files. Indicate the URL where the information is available.
8
Please, supply any additional information to assist the Satellite Advisor to recommend
frequencies for your request(s).
Rev. 8.6 4 MAR 2013
Experimental Station Frequency Coordination Request — Page
5
Signature: Licensee agrees to IARU terms and conditions for coordination and represents that all
information provided is true and correct.
9
/s/ Andrew Kalman
__________________________________
Signature of licensee or representative
March 19, 2014
___________________________
Date submitted for coordination
Rev. 8.6 4 MAR 2013
Experimental Station Frequency Coordination Request — Page
6
Annex
Power Budget Summary
Energy Storage
Number
Type
Capacity (Wh)
2
Li-ion Battery
Total capacity (Wh)
9.9
19.8
Power Consumption - Component Level
Component
Mode
Power Needed (W)
Camera
Running
5.52
Radio
Running
5.43
Processor
Running
0.40
Processor
Sleep
0.06
SD Card
Running
0.28
Power Consumed (W)
Power Consumption - Operational Level
Operational Mode
Recording
Duration (h)
Energy Consumed (Wh)
0.083
0.49
429.59
1.47
0.24
16.16
No Telemetry
23.76
2626.86
Processing
21.60
14.69
3844.72
230.68
Transmitting
Telemetry
Sleep
Power Summary
Energy available
Energy consumed
Margin
Total Mission Duration
3024
Wh
2890.28
Wh
153.51
Wh
180
days
Rev. 8.6 4 MAR 2013
Experimental Station Frequency Coordination Request — Page
7
Link Budget (Typical Amateur Radio Ground Station)
DownLink Budget (Typical Amateur Radio Ground Station)
Orbit Altitude
km
300
Spacecraft Elevation Angle
Degrees
90
Frequency
GHz
0.433
Transmitter Power
Watts
2.00
Transmitter Power
dBW
3.01
Transmitter Line Loss
dBW
-1.0
Transmit Antenna Gain
dBi
2.15
EIRP
dBW
1.22
Propogation Path Length
Maximum
km
1000
Space Loss
dB
-171.706
Polarization Loss
dB
0.2
Receive Antenna Diameter
m
NA, yagi antenna, 14ft boom
length, 38 elements
Receive Antenna Efficiency
dBi
15.500
Peak Receive Antenna gain
dBi
15.500
Rx Antenna Line Loss
dB
-1.0
Rx Antenna Beam Width
Deg
30
Rx Antenna Pointing Error
Deg
-+3
Rx Antenna Pointing Error
Loss
dB
1.28
Rx Antenna Gain w/Pointing
Error
dB
14.22
System Noise Temperature
K
356.95
Data Rate
bps
9600
Eb/No
dB
25.1
Bit Error Rate
1.00E-05
Required Eb/No
dB-Hz
15.0
Implementation Loss
dB
-2
Rev. 8.6 4 MAR 2013
Experimental Station Frequency Coordination Request — Page
Margin
dB
8
10.1
Diagrams of the SNAPS Spacecraft
Rev. 8.6 4 MAR 2013
Experimental Station Frequency Coordination Request — Page
9
Rev. 8.6 4 MAR 2013