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1 UCLASSIFIED/APPROVED FOR PUBLIC RELEASE Space and Missile Systems Center Civil avigation Signal Status Maj Michael Zollars 29 Apr _GPS Civil avigation Signal Status UCLASSIFIED/APPROVED FOR PUBLIC RELEASE
2 Report Documentation Page Form Approved OMB o Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 124, Arlington VA Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number 1. REPORT DATE 29 APR TITLE AD SUBTITLE Civil avigation Signal Status 2. REPORT TYPE 3. DATES COVERED to a. COTRACT UMBER 5b. GRAT UMBER 5c. PROGRAM ELEMET UMBER 6. AUTHOR(S) 5d. PROJECT UMBER 5e. TASK UMBER 5f. WORK UIT UMBER 7. PERFORMIG ORGAIZATIO AME(S) AD ADDRESS(ES) Air Force Space Command,Space and Missile Systems Center,Los Angeles AFB,El Segundo,CA, PERFORMIG ORGAIZATIO REPORT UMBER 9. SPOSORIG/MOITORIG AGECY AME(S) AD ADDRESS(ES) 1. SPOSOR/MOITOR S ACROYM(S) 12. DISTRIBUTIO/AVAILABILITY STATEMET Approved for public release; distribution unlimited 11. SPOSOR/MOITOR S REPORT UMBER(S) 13. SUPPLEMETARY OTES Presented at the GPS Partnership Council 215 (GPSPC15), held April 29 to May 1, 215, at the Los Angeles AFB, CA. 14. ABSTRACT 15. SUBJECT TERMS 16. SECURITY CLASSIFICATIO OF: 17. LIMITATIO OF ABSTRACT a REPORT unclassified b ABSTRACT unclassified c THIS PAGE unclassified Same as Report (SAR) 18. UMBER OF PAGES 9 19a. AME OF RESPOSIBLE PERSO Standard Form 298 (Rev. 8-98) Prescribed by ASI Std Z39-18
3 UCLASSIFIED/APPROVED FOR PUBLIC RELEASE Civil avigation(cav) History SPACE AD MISSILE SYSTEMS CETER SMC/GPEV SUMMER 213 CAV LIVE-SKY TEST EVET OV213 AFSPC/CC DIRECTS COTIUOUS CAV BROADCAST PRIOR TOOCX SOFTWARE DEV & ITEGRATIO TRASITIO A TEST TOOL ITO A OPS CAPABILITY MGUE LIVE-SKY TESTIG SUPPORTMGUE DEVELOPMET \I '\ DIRECT COECT OF MODAV LAPTOP MODAV TOOL VERIFICATIO CLOSED-LOOP ED-TO-ED SIGAL VERIFICATIO OPS ITEGRATIO TRAIIG MATERIALS AD UPDATED TECH ORDERS 25 APR 14 AFSPC/A3AUTHORIZATIO FOR CAV BROADCAST R.llWL: APR 21 2 UPLOADS PER WEEK WALK: JU 214 3UPLOADS PER WEEK 11/I. DEC 214 DAILY UPLOADS DEC 214 MODAV SOFTWARE ITEGRATED ITOAEP _GPS Civil avigation Signal Status UCLASSIFIED/APPROVED FOR PUBLIC RELEASE 2
4 UCLASSIFIED/APPROVED FOR PUBLIC RELEASE ~,,~ ~, 4,, Civil avigation(ca~}ac~~~~~s~l~~y~ T~M~~~~T~R CAV Message Types 1, 11, 3, 33 currently transmitted on seven GPS IIR-M (L2C) & eight GPS IIF SVs (L2C & L5) - MODAV Tool integrated w/aep providing CAV message generation - Daily CAV uploads as of 31 Dec 14 Signal Performance - CAV performing on par with Legacy during daily uploads - Total RMS URE from 31 Mar- 7 Apr 15 Legacy:.517 m (URE for this week aided by additional LAV uploads) Modernized:.584 m - Best week: 22 Mar - 29 Mar 15 Modernized:.397 m GPS IIF Launch & Constellation Upgrade - SV 68 & SV 69 Ops Accepted to users for Legacy Signals CAV message broadcast as of 23 Feb 15 - SV 71 successful launch 25 Mar 15 - SV 72 Launch scheduled for Jul 215 CAV message broadcast for SV 71 & SV 72 expected Aug 215 Pre-operational CAV Broadcast Performance As Expected _GPS Civil avigation Signal Status UCLASSIFIED/APPROVED FOR PUBLIC RELEASE 3
5 UCLASSIFIED/APPROVED FOR PUBLIC RELEASE L2C Performance: 28 Apr to 28 Feb 14 CAV Performance SPACE AD MISSILE SYSTEMS CETER CAV & LAV Performance from Modernized SVs (IIRM & II F) 6. _ - - LAV_URE ~ ~ l r --- CHAV-AOO fi-1-!{--: ~~~ ~-- ~ = : II 1 t t la 4. +-~*::~;r: -~;;:~: ~; ~:~ ~ ~:~~- -+~- 1 ~-- --i _: :;t, :} 1: :t ~~ ~ r: ' 1- ~r +=-~ -~-+- --~~ - -r----+~~- ;r _ _,_--_--~ ~ -~ CHAV_URE r l - -~- f ~...-:-_: ~::~-~~:v - ::: - f ::::::: ~ :=~-~~ == _ ~.--~;, ~- r-- -_-,_-~-- +*_-_-_,_ -_=-_ --+-=-:- ~r ::=-+ 5 ~ J,::.... ~~-- :.... i l. - _---t-- ~ ~t11-ffi ~( h c- ~l-{~ -!- -- r--- :-- -* -:- - --}- -+, - 3--< -) ~ -== = 4 ci I~ 1,1-n- I.I i.'!l f ll I U I I II C!': I II M I ll A I I II.!: lo ~ ~~.. ""~o"jl r"\t~ 1 ~,..- r-!r-: ). _,.. "I "" -- ~ 1 r " lr" - o 1 " lj "" \ V ~.-~, I... _,.... ~; p--i _, "'" !- I ~-- ~. J. 11..:.. I..... :.!:... ~- -'. ll. --:: c I ~ ~ t : :~; : II - - :1 1 : ' J o.!l~.li.j 1: : U. J!.! i II 1 I...i.. I 1 I 1 I T 1 1 I '"" I 11 1 " II!i 1 3!" 1 1 I., ~ I I ~ I 1.1! ~~ :J. : : 1 I ~: ~ :.l _. :: ol : 1} ~ 1 : I ,} -.-- IJIAlJp.f ~ ~~~ ~:! -~~~::: ;.f-i { r1' ~ d -~~:~~ t 1; :i!+!]-~ &,..... II w o ~ ~. 1 Iii'.IT~ I 't- -- -, J A l ILl lt- I.. IW IH-J l-l lj ~~ I I:A ~J. -- ~ ~ f- ~~\L~A ~ ~ ~~~LI~, J1~;:'{'~-,..... ~;~~~.,~1~f=r-~}=1 ~=~ ~k-=+~~:~- [~U:l.f..~-= - ~;~~- ~'~ ~=~~ ~-- ~~!~-.!.% ~ ~ MAV LIVE-SKY Daily Uploads r - - t l "--- " = r. CL l1. ~= - L-J._ TEST EVET. ~ (\') '"; '<t ~.... '<t '";.... '<t '<t CD q I() (7) q '"; q q I() I() Daily uploads of pre-operational CAV performance within expectations _GPS Civil avigation Signal Status UCLASSIFIED/APPROVED FOR PUBLIC RELEASE 4 q q I()
6 ~ l'tjftci;f UCLASSIFIED/APPROVED FOR PUBLIC RELEASE CAV Performance ' ~ ~. ot'.fl~'4: S'? --=======---c::::====== : SPA C E AD MISSILE SYSTEMS CETER L2C Performance starting with Daily Uploads: 1 Jan 15 to Present day tn 2. Q) 1.8 -Q) E 1.6 w 1.4 ::: ::J 1.2 en 1. en.8 en ~.6 :::.4.2. CAV & LAV Performance from Modernized SVs (IIRM & II F) 3. - LAV_URE CAV_URE - - CAV-t.HAV LAV_AOO CAV AOO.., II. A. J. '\'.. +''~ I\" / ''V-'',,,,, "\Jv: ~... ~..J.~ ~...At, ~i'ac-.! l"vt,j \ ~~ ~,._,.. \f,. _,..._,..., ~..("',~,~,,..,., \ I., '. 4' I ' I" : S' " \ I ~..,A V\ ~ rn 1:\ AlA A. ~ ~ J \AI' 1\ ~ \ AI\J \{ v -..a. ~ JJ\)- ~ -v v-' ~.A VJ y 'IIIII ' -..,_, I " 1,.,!'., /" -... ;.,_,... '- - ~ ~~A\ ~,,,..,.,. I 1',] I.-..- /\,, " I\ /' '"'"' -.2 (X) I() > I() > <D I() > <D q q '<;' ~ ~ q ~ q ~ q (I? M M (I? ~ q q q q q q q q q q q q q q I() I() I() I() I() I() I() I() I() I() I() I() I() I() tn ::J 1 J:~ ( 8 -( ~ Q) 6 C) <( (!) 4 ~ 2 LAV slightly better than CAV due to addition LAV uploads _GPS Civil avigation Signal Status UCLASSIFIED/APPROVED FOR PUBLIC RELEASE 5
7 UCLASSIFIED/APPROVED FOR PUBLIC RELEASE Live-sky event summer of Test & Verification of 8/15 defined CAV Message Types - Led to pre-operational use beginning 28 Apr 14 Planned live-sky event fall of 215 CAV Development SPACE AD MISSILE SYSTEMS CETER - Incorporate Midi Almanac (MT37) GPS IIF SV require only MODAV Tool software updates GPS IIR-M SVs require MODAV Tool & SV software updates as well as changes to ICDs - Exercise functionality of GSS off-set parameters (MT35) Integration efforts in progress with GA and USO for direct feed of GGTO, UTC and ISC values into AEP Future development TBD - Software development and test of differential corrections & text messaging require additional knowledge on COOPs and/or intended use MT13 (Clock Differential) MT14 (Ephemeris Differential) MT15 (Text) MT34 (Clock & Differential) MT36 (Clock & Text) - Broadcast of reduced almanac (MT 12 & MT 31) is unlikely; pending further direction _GPS Civil avigation Signal Status UCLASSIFIED/APPROVED FOR PUBLIC RELEASE 6
8 UCLASSIFIED/APPROVED FOR PUBLIC RELEASE CAV Development Msg CAV Message Title Function/Purpose Type Default Default message (transmitted when no msg data is available) 1 Ephemeris 1 SV position parameters for the transmitting SV 11 Ephemeris2 SV position parameters for the transmitting SV 12 Reduced Almanac Reduced almanac data packets for 7 SVs 13 Clock Differential Correction SV Clock differential correction parameters 14 Ephemeris Differential Correction SV Ephemeris differential correction parameters 15 Text Text, 29 eight-bitascii characters SPACE AD MISSILE SYSTEMS CETER 3 Clock, IOO & Group Delay SV Clock Correction Parameters, Ionospheric and Group Delay correction parameters (Inter-Signal Correction parameters) 31 Clock & Reduced Almanac SV Clock Correction Parameters, Reduced almanac data packets for 4 SVs 32 Clock& EOP SV Clock Correction Parameters, earth orientation parameters; ECEF-to-ECI coordinate transformation 33 Clock& UTC SV Clock Correction Parameters, Coordinated Universal Time (UTC) Parameters 34 Clock & Differential Correction SV Clock Correction Parameters, SV clock and Ephemeris differential correction parameters 35 Clock& GGTO SV Clock Correction Parameters, GPS to GSS Time Offset parameters. 36 Clock& Text SV Clock Correction Parameters, Text, 18 eight-bit ASCII characters 37 Clock & Midi Almanac SV Clock Correction Parameters, Midi Almanac parameters 15 Defined Message Types D Tested & verified summer of 213 D Development planned for fall test event 215 D Conops/direction required for development & test _GPS Civil avigation Signal Status UCLASSIFIED/APPROVED FOR PUBLIC RELEASE 7
9 UCLASSIFIED/APPROVED FOR PUBLIC RELEASE CAV Monitoring Operational monitoring of civil modernized signals - Joint Propulsion Lab (JPL) world-wide monitoring stations Initial capability and procedures delivered to 2SOPS Dec 214 Capability upgrade scheduled for Feb 216 SMC/GP MODAV Database & Website SPACE AD MISSILE SYSTEMS CETER - SMC/GP & MITRE COUS CAV website data bits (L2C & L5) updated every 15 min or - GA global CAV data bits (L2C only) updated daily - Expansion of GA L5 Signal Monitoring by L2C and LS updated every 15 min or less Legacy signals remain the priority during CAV pre-operational broadcast - If URE or AOD limits are exceeded, the path forward will not affect the broadcast of legacy signals - Collaboration with GPE, GPL and FFRDC teams to include the GPE/MITRE MODAV database & website will occur to determine the best course of action if the URE or AOD limits are exceeded _GPS Civil avigation Signal Status UCLASSIFIED/APPROVED FOR PUBLIC RELEASE 8
10 UCLASSIFIED/APPROVED FOR PUBLIC RELEASE Questions SPACE AD MISSILE SYSTEMS CETER _GPS Civil avigation Signal Status UCLASSIFIED/APPROVED FOR PUBLIC RELEASE g
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