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Previous Meetings
University of Colorado - BoulderWhen: October 27, 6:00
PM Linked, Autonomous, Interplanetary Satellite Orbit Navigation
Annual Dinner Meeting - 2005
John Lavrakas gave a talk on the Civil Monitoring of GPS.
The Rocky Mountain Section of the Institute of Navigation (ION) will hosted a meeting on May 27th, 2003 at the University of Colorado at Boulder. The meeting will begin at 6:30 PM with a social and refreshments, followed by presentations starting at 7:00 PM. There will be three presentations : Dr. Marc Weiss presented "Time and Time Transfer with GPS and WAAS." Dr. Weiss is a Mathematician at NIST's Time and Frequency Division. He has worked with GPS since 1980. He has both worked as a user for common-view time transfer and a consultant for GPS development. Dr. Lara Schmidt presented "USNO Precise Timekeeping." Dr. Schmidt is a mathematician at the US Naval Observatory Alternate Master Clock in Colorado Springs. She works in both GPS and atomic timescales, and specializes in the statistical technique of long-memory modeling. Dr. Kristine Larson presented "Carrier Phase Time Transfer." Dr. Larson is an Associate Professor, Department of Aerospace Engineering Sciences at University of Colorado, Boulder. She specializes in geophysical applications and technique development of the Global Positioning System for measurements of plate tectonics, plate boundary deformation, volcano monitoring, ice flow and loading, and time transfer. The meeting was held in room ECAE 1B16 (Lockheed Martin Room) of the Engineering Center. The room is on the basement level on the north side of the Engineering Center. Signs will be posted to aid your search. See the Map: Meeting Minutes and PresentationsInstitute of Navigation, Rocky Mountain Section Meeting: Quarterly Section Meeting The Rocky Mountain Section of the Institute of Navigation and the University of Colorado-Boulder co-hosted a meeting on May 27, 2003 at the Boulder campus. The meeting featured three outstanding presentations on GPS time transfer. Approximately 20 members and students took part in the session. Dr. Marc Weiss, a mathematician at the National Institute of Standards and Technology (NIST) Time and Frequency Division, presented the first topic entitled “Time and Time Transfer with GPS and WAAS.” Dr. Weiss has worked with GPS since 1980, both as a user of common-view time transfer and a consultant for GPS development. He covered a range of topics, including comparisons between one-way, two-way, and common-view time transfer, and a brief tutorial on the differences between stability and accuracy. Weiss Presentation: The second presentation of the evening was “USNO Precise Timekeeping,” delivered by Dr. Lara Schmidt. Dr. Schmidt is a mathematician at the US Naval Observatory Alternate Master Clock in Colorado Springs. She works both in GPS and atomic timescales, and specializes in the statistical technique of long-memory modeling. She presented a history of timekeeping, uses of precise time, an overview of several timescales, and some statistical analysis of GPS time transfer from 2002. Schmidt Presentation: Contact Dr. Lara Schmidt directly for a copy of her presentation Dr. Kristine Larson presented the final topic of the evening, “High Precision GPS Carrier Phase Time Transfer.” Dr. Larson is an Associate Professor in the Department of Aerospace Engineering Sciences at CU-Boulder. She specializes in geophysical applications and technique development of the GPS for measurements of plate tectonics, plate boundary deformation, volcano monitoring, ice flow and loading, and time transfer. Her presentation summarized some of the on-going dissertation work of John Plumb, a PhD candidate at CU. She presented some of their results comparing carrier phase time transfer performance to common-view and two-way time transfer. Larson Presentation: High
Precision GPS Carrier Phase Time Transfer The section would like to extend our gratitude to Penny Axelrad, active ION member and Associate Professor in the Department of Engineering Sciences at CU-Boulder, for her assistance in coordinating this event.
Presenters at the 27 May 03 RMS-ION Meeting in Boulder
Where: Academy Club, United States Air Force Academy When: January 14th, 2003, 7:00 to 9:00 PM Speaker: Dr. Gerard Lachapelle Impact
of Galileo on GNSS Availability, Reliability and Accuracy Click here for Dr. Lachapelle's Presentation (1.5 MB, PowerPoint Format, contact webmaster if another format is required) Agenda: 7:00
p.m. reception Minutes: The Rocky Mountain Section of the Institute of Navigation
held its annual dinner meeting on January 14, 2003 at the United States Air
Force Academy. The meeting was well
attended by roughly 30 members, and served as an excellent forum to recap the
previous year’s events and to look toward the future. As part of the meeting, outgoing RMS Chair, Garth Powell of
SY Technology, provided a summary of activities from 2002.
Highlights from the year included youth outreach activities at local
middle schools, GPS receiver tutorials to the Boy Scouts, and an entertaining
and educational presentation at the University of Colorado-Boulder campus. The section then conducted elections for new officer
positions. John Broomfield of
Overlook Systems Technologies was elected to a one-year term as Chair.
Lt Steven Bolt of the 2d Space Operations Squadron (2 SOPS) was
re-elected to the position of treasurer. Jeff
Crum of Infinity Systems Engineering was elected to a two-year term of section
secretary. Following the elections, the attendees were treated to a
very interesting talk from Dr. Gerard Lachapelle, Western Region Vice President
of the ION, Professor and Head, Department of Geomatics Engineering at the
University of Calgary. Dr.
Lachapelle’s presentation was titled “The Impact of Galileo on GNSS
Availability, Reliability, and Accuracy.”
He presented findings comparing horizontal position errors at various
mask angles with a GPS-only solution and a GPS-plus-Galileo solution.
The results clearly indicate that civil positioning performance will
greatly benefit from the addition of Galileo satellite signals. (click to enlarge)
Picture 1 Picture 2 Picture 1: Left to Right, John Lavrakas, Stephen Bolt, Dr.
Gerard Lachapelle, Garth Powell, Stewart Cordero
Where: University of Colorado, Boulder When: April 18, 2002 -- Social 6:30 PM, Presentations begin: 7:00 PM Speakers: Dr. Penny Axelrad, Overview of GPS Research in Boulder
Dallas Masters, Bistatic GPS Radar Principles and Applications
Minutes: On April 18, 2002, a meeting of the Rocky Mountain Section was held at the University of Colorado in Boulder Colorado. More than 35 people attended this meeting. After a food and social period, Section Chair Garth Powell led off meeting the with a discussion of local chapter activities and upcoming events. These included an announcement of a class on the Global Positioning System scheduled to be given to the Gifted and Talented students at Russell Middle School on May 6, 2002. Dr. Penina Axelrad, CU Professor of Aerospace Engineering Sciences and Chair of the ION Satellite Division, gave an overview of GPS research in Boulder. These included multiple research projects at CU’s Colorado Center for Astrodynamics, and a number of additional projects at other research facilities in Boulder.
Dallas Masters, Ph.D. student in the CU Department of Aerospace
Engineering Sciences gave a presentation entitled "Bistatic GPS Radar
Principles and Applications." He
reported on projects he was leading at CU applying the GPS Bistatic Radar both
as an aircraft altimeter and in the Soil Mixture Experiment 2002.
Mr. Powell then spoke on the National ION organization and activities,
while ION Satellite Division Vice-chair John Lavrakas discussed benefits of ION
membership to the CU students who attended this meeting.
Where: "Planning the Future of GPS" - February 28, 2002 Presented by: John W. Lavrakas, Overlook Systems Technologies, Inc. Mr. Lavrakas will present a survey of current initiatives supporting the modernization of GPS, including military and civilian interagency involvement, definition of operational requirements, the GPS III program and GPS systems engineering. This is based on work he has done for Air Force Space Command and the Office of Assistant Secretary of Defense/C3I.
RMS-ION Officer Election Results (for 2002) Garth Powell Treasurer: (Term Continuing) Lt. Stephen Bolt Meeting Minutes: The Rocky Mountain Section of the Institute of Navigation (RMS-ION) held a general section meeting and technical presentation on February 28, 2002 at SY Technology in Colorado Springs. Twenty-six people attended the meeting, which included a social period with sandwiches and snacks. New section officers were voted in at the meeting. The new officers are: New Section Chair Garth Powell gave a brief talk on the benefits of ION membership and outlined section plans and goals for the year. Although details had not been finalized, the next section meeting is planned for April at the University of Colorado in Boulder, and feature a presentation of a part of the GPS research being conducted at that institution by Dr. Penina Axelrad. Section goals include a meeting later in the year at Schriever AFB to include a tour of the Second Space Operations (2SOPS) GPS operations facilities and the US Naval Observatory Alternate Master Clock. Other goals include continued community navigation and GPS education programs with schools and scouting groups. A further goal is possible RMS-ION support in the hosting of the 2SOPS Performance Analysis Working Group (PAWG), contingent upon 2SOPS approval and agreement to hold the PAWG this year. For the second half of the meeting, Mr. John Lavrakas gave a presentation, entitled, "Planning the Future of GPS". Mr. Lavrakas is a Senior Staff Engineer for Overlook Systems Technologies, Inc. where he serves as Director of Operations Support for the Department of Defense GPS Support Center. He also serves as the Vice-chair of the Satellite Division of the ION. Mr. Lavrakas presented a survey of current initiatives supporting the modernization of GPS, including military and civilian interagency involvement, definition of operational requirements, the GPS III program and GPS systems engineering.
November 30, 2001 The Rocky Mountain Section of The Institute of Navigation is hosting a joint dinner meeting with the IEEE on November 30th. Logan Scott of George Washington University will present a lecture entitled "Rapid Signal Acquisition Techniques for GPS User Equipment - A Discussion of Applications, Techniques and Performance" Social will begin at 5:30 pm, with dinner at 6:00 pm. Cost is $15.00 per person. It is being held at the Red Lion Hotel (Formerly Le Baron Hotel). The Red Lion is located 1 block west of I-25 at the Downtown/Bijou exit in Colorado Springs, at 314 W. Bijou.
January 25, 2001 Where: Air Force
Academy Officers Club Meeting Minutes The Rocky Mountain Section of the Institute of Navigation (RMS-ION) held its annual dinner meeting on Thursday, January 25th, 2001. There were fifteen attendees of this dinner meeting, which was held at the Air Force Academy Officer’s Club in Colorado Springs, Colorado. ION Western Regional Vice-President, Dr. A.J. Van Dierendonck, was the guest speaker. He gave a talk entitled "Future GPS Civil Signals", in which he discussed the details both of the new GPS L5 signal and the new CA signal on L2. At the meeting, elections were held for the offices of Chair and Treasurer. Richard Pache was elected to the position of Chair. Richard has been an active member of RMS-ION for 4 years, and presently works in the GPS hardware group at Schriever AFB for Allied Signal/Honeywell. 2nd Lt. Stephen Bolt was elected to the position of Treasurer. Stephen is a GPS Block IIR Navigation Payload specialist in the Second Space Operations Squadron (2SOPS) at Schriever AFB. The Rocky Mountain Section extends its congratulations to both of its new officers. Sincerely, Garth E. Powell Executive Secretary, RMS-ION
November 1, 2000 Time: 5:30 PM Location: Old Chicago's, Austin Bluffs and Academy Topic: Social for the 2SOPS Performance Analysis Working Group attendees
March 15, 2000 Time: 5:30 P.M.
Location: Litton/PRC Building on the corner of Powers and Galley in Colorado Springs (Officially, Directions: Take Academy Blvd to Galley and turn East. Take Galley until you reach Powers, the building will be on your right at that corner. Enter the doors on the 1st floor, west side of the building and turn right after entering the building. You'll see the ACS offices then. Speaker: A representative from the El Paso County Search and Rescue Team Topic Area: Navigational techniques they use in their search and rescue operations
January 20, 1999 Topic: Elections and "Precise GPS Applications". Speaker: Mr. Bill Hoffman from Colorado Space.
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