Michael L. Umbricht W9GYR - Blogging at Brown University · 2017. 11. 16. · June 22, 2017 Amateur...

June 22, 2017

Amateur Radio Emergency Data NetworkProvidence, Rhode Island

Michael L. Umbricht W9GYRBrown University Physics

http://aredn.org/

https://www.brown.edu/academics/physics/

http://aredn.org

http://aredn.org/

https://mosselbaymesh.co.za/news/

Woonasquatucket River, Mar. 30-31, 2010

←W9GYR

Valley Street, downstream from W9GYR

http://www.woonasquatucket.org/galleryOne.php?galleryID=1


https://pubs.usgs.gov/sir/2013/5191/pdf/sir2013-5191.pdf


http://www.aredn.org/sites/default/files/sites/default/files/pictures/user12/New%20York%20City%20Marathon%202016%20AREDN%20Mesh%20Network%20Status%20-%2020161126.pdf




http://w2wcr.org/projects/broadband-hamnet-hsmm-mesh


Part 15 WiFi limits

http://www.air802.com/fcc-rules-and-regulations.html

13 cm amateur band2.390-2.450 GHz

https://en.wikipedia.org/wiki/List_of_WLAN_channels

AREDN 2.4 and 3.4 GHz channels

http://www.aredn.org/sites/all/themes/danland/images/slideshows/IMG_2-3_Channels-v5.jpg



https://www.ntia.doc.gov/osmhome/allochrt.pdf

https://www.ntia.doc.gov/report/2013/evaluation-5350-5470-mhz-and-5850-5925-mhz-bands


AREDN 5.8 GHz channels



Orthogonal Frequency-Division Multiplexing(5, 10, or 20 MHz bandwidth)

http://rfmw.em.keysight.com/wireless/helpfiles/89600b/webhelp/subsystems/wlan-ofdm/Content/ofdm_basicprinciplesoverview.htm



http://www.utm.edu/staff/relmore/Mesh_Services.gif

Linksys WRT54G hardware

http://www.broadband-hamnet.org/

https://openwrt.org/

Ubiquiti Networks hardware

http://www.thefarmonline.com/2016/05/ham-radio-mesh-networks-fun-and.html


http://www.aredn.org/content/software

http://www.qsl.net/kd2bd/splat.html

← KD1HA

W9GYR

W1OP Toby St.

http://www.ic72.com/pdf_file/d/122899.pdf

https://airlink.ubnt.com

https://airlink.ubnt.com/

http://www.aredn.org/forums/rhode-island


Michael L. Umbricht W9GYR

Contact me:

● twitter: @W9GYR● google: +MichaelUmbricht● email: [email protected]● www: http://fornax.umbricht.org

AREDN Rhode Island:

[email protected]

mailto:[email protected]

http://fornax.umbricht.org/



http://fornax.umbricht.org/


AREDN Rhode Island June 22, 2017

Mike Umbricht W9GYR 1

June 22, 2017

Amateur Radio Emergency Data NetworkProvidence, Rhode Island

Michael L. Umbricht W9GYRBrown University Physics

Amateur Radio Emergency Data Nework

http://aredn.org

Brown University Physics

https://www.brown.edu/academics/physics/



http://aredn.org

AREDN website.

http://aredn.org



Mossel Bay Mesh Network

https://mosselbaymesh.co.za/news/



Woonasquatucket River, Mar. 30-31, 2010

←W9GYR

Valley Street, downstream from W9GYR

The March 30-31, 2010 high water mark was 5.35 feet above the 1% Annual Exceedance level (a “once in a century” flood) at Manton Ave.

Top: Woonasquatucket River behind Atlantic Mills showing mesh node location.

Credit: Woonasquatucket River Watershed Council


Bottom: Valley Street, downstream from Atlantic Mills.

Credit: USGS, FEMA




New York City Marathon 2016




Example mesh topology.

Credit: Warren County Radio Club W2WCR




Part 15 WiFi limits

Consumer WiFi point-to-multipoint Part 15 rules.

Credit: AIR802

http://www.air802.com/fcc-rules-and-regulations.html




Overlapping channels for 2.4 GHz WiFi.

Credit: Michael Gauthier / Wikipedia

https://en.wikipedia.org/wiki/List_of_WLAN_channels



AREDN 2.4 and 3.4 GHz channels

Shared and non-shared channels at 2.4 and 3.4 GHz.

Credit: AREDN





Allocations and WiFi channels near 5.8 GHz.

Credit: National Telecommunications and Information Administration

https://www.ntia.doc.gov/osmhome/allochrt.pdf




AREDN 5.8 GHz channels

Shared and non-shared channels at 5.8 GHz.

Credit: AREDN




Orthogonal Frequency-Division Multiplexing(5, 10, or 20 MHz bandwidth)

Example modulation scheme for 802.11 WiFi.

Credit: Keysight Technologies




Martin (Weakley County) TN mesh.

Credit: Roger Elmore KJ4AJP

http://www.utm.edu/staff/relmore/Mesh_Services.gif



Linksys WRT54G hardware

Linsys WRT54G with omni and directional antennas. (Firmware not maintained and has software bugs; don't use.)

Credit: Michael Umbricht W9GYR



Broadband-Hamnet website firmware download. (Not maintained; don't use.)




OpenWrt command line interface to mesh node screenshot.

https://openwrt.org/



Broadband-Hamnet firmware web interface screenshot.




Ubiquiti Networks hardware

An omni and point to point AREDN 5GHz mesh site feeding a D-STAR repeater.

Credit: Michael Brown KG9DW




ARDEN website firmware download.




AREDN firmware web interface screenshot.




Estimated coverage for an omnidirectional antenna at W9GYR Atlantic Mills, Manton Ave. Olneyville and location of KD1HA on Atwells Ave. Providence. Distance is 2.2 km.

SPLAT! is an RF Signal Propagation, Loss, And Terrain analysis tool for the electromagnetic spectrum between 20 MHz and 20 GHz.

http://www.qsl.net/kd2bd/splat.html

Credit: Google Earth



← KD1HA

View from Atlantic Mills site looking towards downtown Providence and KD1HA node on Atwells Ave.

Credit: Michael Umbricht W9GYR



View from Atwells Ave. looking towards Olneyville and Neutaconkanut Hill.

Credit: Denis Couture KD1HA



W9GYR

W1OP Toby St.

Closeup view from Atwells Ave. looking towards Olneyville and Neutaconkanut Hill showing Atlantic Mills and Toby St. hi-rise.

Credit: Denis Couture KD1HA



Line of sight and elevation profile for W9GYR to KD1HA link. Path is 1 degree up; antenna has 5 degree down tilt.

Credit: Google Earth, DM Antenna Technoogies

http://www.ic72.com/pdf_file/d/122899.pdf




Link simulator for W9GYR to KD1HA link. Path is 1 degree up; antenna has 5 degree down tilt.

Credit: Google Earth, Ubiquiti Networks, Inc




Signal-to-noise ratio for link.

AREDN firmware screenshot




Current status of wireless nodes with links from Providence Communications to Atwells to Atlantic Mills.

Red: active wireless nodesYellow: VPN tunnel only nodesGreen: planned sitesBlue: potential sites




Topology map of wireless links.

olsr-topology-view.pl screenshot



Providence and vicinity nodes.





Topology map of VPN and DtD links.

olsr-topology-view.pl screenshot



Current active nodes statewide.





The next hop to Providence Radio Association W1OP.





Potential expansion.






AREDN Rhode Island discussion forum.




Michael L. Umbricht W9GYR

Contact me:

● twitter: @W9GYR● google: +MichaelUmbricht● email: [email protected]● www: http://fornax.umbricht.org

AREDN Rhode Island:

[email protected]

Michael L. UmbrichtDepartment of PhysicsBox 1843Brown UniversityProvidence, RI 02912

Michael L. Umbricht W9GYR - Blogging at Brown University · 2017. 11. 16. · June 22, 2017 Amateur...

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