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A look at the IGS predicted orbit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..l . O9 (Abstract only) J. Zumberge Real time ephemeris and clock corrections for GPS and GLONASS Satellites . . . . . . . . . . . . . . . . . 111 M. Romay-Merino, J Nieto-Recio, J Cosmen-Shortmann, J. Martin-Piede[obo Potential use of orbit predictions and rapid products in the GWS programme . . . . . . . . . . . . . . . . . 127 P. Silveslrin Topic 3: IGS Reference Frame Realisation and Contributions to ITRF IGS reference frame realisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..l39 . . J, Kouba, J. Ray, M. Watkins 1TRF96 and follow-on for 1998 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..l73 . C. Boucher, Z. Altamimi, P. Sillard IGS reference stations classification based on ITRF96 residual analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . 177 Z. Ahamirni Estimation of nutation terms using GPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..l83 M. Rothacher, G. Beutler Globally consistent rigid plate motion: Fiducial-free Euler vector estimation . . . . . . . . . . . . . . . . . . . 191 G. Blewitt, R. Kawar, and P. Davies Topic 4: IGS Products for Troposhpere and Ionosphere IGS Combination of tropospheric estimates - experience from pilot experiment . . . . . . . . . . . . . ..2O5 G. Gendt Water vapour from observations of the German Geodetic GPS reference network (G~F) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..2l7 . (summary) M. Becker, G. Weber, C. Kopken Estimating horizontal gradients of tropospheric path delay with a single GPS receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...223 (Abstract only) Y. Bar-Sever, P. Kroger, J. Borjesson IGS products for the ionosphere . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...225 J. Feltens, S. Schaer IONEX: The Ionosphere Map EXchange, Format Version 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...233 vi
S. Schaer, W. Gurtner, J Feltens The study of the TEC and its irregularities using a regional network of GPS stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..- . . . . . . . . ..- . . . . . . . . ..--- . . . . . . . ...-...-......................-..-...249 R. Warnant Monitoring the ionosphere over Europe and related ionospheric studies . . . . . . . . . . . . . . . . . . . . . . . . . . .265 N. Jakowski, S. Schluter, A. Jungstand Routine production of ionospheric TEC maps at ESOC - first results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .273 J. Feitens, J. Dow, T. Martin-Mur, C. Garcia-Martinez, P. Bernedo Chapman profile approach for 3-D global TEC representation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...285 1 Feltens The role of GPS data in ionospheric monitoring, mapping and nowcasting . . . . . . . . . . . . . . . . . . . . ...299 1?. Leitinger Mapping and predicting the ionosphere . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..3O7 S. Schaer, G. Be-utler, M. Rothacher Contributed papers on other topics Experiences of the BKG in processing GLONASS and combined GLONASS/GPS observations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 . . H. Habrich Precise autonomous ephemeris determination for fiture navigation satellites . . . . . . . . . . . . . . . . ...333 M. Romay-Merino, P. van N@-ik ARP project: Absolute and relative orbits using GPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...347 T, Martin-Mur, C. Garcia-Martinez Poster Summary Papers IGS related activities at the Geodetic Survey Division of Natural Resources Canada . . . . . . . . . . . . . . . . . . . . . ..-. - . . . . ..- . . . . . . . . ..- . . . . . . . . . . . . . . . . . . . . . . . . . .." . . . . . .." . . . . ...-.....353 C. Huot, P Tktreault, Y. Mireault, P. H&oux, R. Ferland, D. Hulchison and J. Kouba ESWESOC IGS Analysis Centre poster sum~ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...357 C. Garcia-Martinez, J. Dow, T. Martin-Mur, J Feltens, P. Bernedo Recent IGS Analysis Center Activities at JPL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...363 D. Jefferson, Y. Bar-Sever, M. Hejlin, M. Watkins, F. Webb, J. Zumberge A review of GPS related activities at the National Geodetic Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...367 vii
Page 1 and 2: T 8 A N A L Y S I S CENTER WORKSHOP
Page 3 and 4: FOREWORD The 1998 Analysis Centre W
Page 5: TABLE OF CONTENTS Foreword . . . .
Page 9 and 10: Programme of Workshop 1
Page 11 and 12: @esa m=l, ::=mlllll lx= mj:n IGS AN
Page 13 and 14: ,.,,. ,:, -.. ., ,,.Y @esa 9=II::=R
Page 15 and 16: EXECUTIVE SUMMARYl G. Beutler The 1
Page 17 and 18: activities one has the problem that
Page 19 and 20: future tasks are clearly defined. M
Page 21 and 22: ut due to the usually excellent inf
Page 23 and 24: Ionosphere The position paper “IG
Page 25 and 26: SUMMARY RECOMMENDATIONS OF THE DARM
Page 27 and 28: 6. That a (super) combination of G-
Page 29 and 30: Annex IGS Fiducials for ITRF Refere
Page 31 and 32: ● coordinates and velocities of t
Page 33 and 34: archiving, site and RINEX standards
Page 35 and 36: it is unlikely that a single person
Page 37 and 38: GOVERNING BOARD The Governing Board
Page 39 and 40: Topic 1: The IGS Analysis Products
Page 41 and 42: used, the consistency between all t
Page 43 and 44: Consistency between the IGS orbits
Page 45 and 46: Table 1. Median daily repeatabiliti
Page 47 and 48: Of course the inclusion of bad sate
Page 49 and 50: consistent with the IGS reference f
Page 51 and 52: GNAAC, of providing station coordin
Page 53 and 54: One large future “customer” of
Page 55 and 56: seconds. A format for station and s
Page 57 and 58:
Zumberge, J. F., M. B. Heflin, D. C
Page 59 and 60:
INTRODUCTION PRECISE HIGH-RATE SATE
Page 61 and 62:
FIXED STATION CLOCKS APPROACH A sec
Page 63 and 64:
250 -150- - -250- 3.00 3.33 3.66 4.
Page 65 and 66:
HIGH-RATE STATION CLOCKS One advant
Page 67 and 68:
INTRODUCTION THE IGS/BIPM TIME TRAN
Page 69 and 70:
A type of point positioning likely
Page 71 and 72:
differences. This is probably suffi
Page 73 and 74:
Topic 2: Orbit Prediction and Rapid
Page 75 and 76:
The factors that limit the accuracy
Page 77 and 78:
Table 1. Number of stations availab
Page 79 and 80:
Table 3. Effect of different pertur
Page 81 and 82:
Table 4. Orbit fit (7-day) and orbi
Page 83 and 84:
A more than twofold improvement in
Page 85 and 86:
60 40 Ii . . . ..- ● E WC.W 2 heu
Page 87 and 88:
10 5 t t + IV (cm) ☞ ☞ IGS rapi
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Broc~dcast orbits for non—eclipsi
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Table 1. Effect of different Pertur
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where aD~, aDC, aDS, aye, aye, ays,
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: : m . > > : ~ ~ g z 2 CPS WEK (a)
Page 97 and 98:
Table 2. Selected “optimal” orb
Page 99 and 100:
lines in both plots showing the Do
Page 101 and 102:
The RPR model is based on the time
Page 103 and 104:
likely caused by the eclipsing sate
Page 105 and 106:
Appendix This Appendix gives some s
Page 107 and 108:
NEW SOLAR RADIATION PRESSURE MODELS
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120 100 20 \ lm 10m J-IA c Ic predi
Page 111 and 112:
Using the current GNSS systems, use
Page 113 and 114:
meter, this will be sufficient to p
Page 115 and 116:
Standards and meteorological loggin
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decades, This package has been exte
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mainly due to the bad geometrical c
Page 121 and 122:
corrections can be compensated by c
Page 123 and 124:
These results can be compared with
Page 125 and 126:
BACKGROUND POTENTIAL USE OF ORBIT P
Page 127 and 128:
were used to validate the basic des
Page 129 and 130:
METOP a.m. GRAS data as parl 0( the
Page 131 and 132:
parameters of both the ‘model wor
Page 133 and 134:
A critical aspect is given by the d
Page 135 and 136:
Topic 3: IGS Reference Frame Realis
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“A global IGS reference system”
Page 139 and 140:
determinations (largely free of the
Page 141 and 142:
Fig. 2. of IGS he Proposed set of 5
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software. As seen from Table 2 and
Page 145 and 146:
of about 0.2 mas are expected, it i
Page 147 and 148:
. All the A-SINEX files (with stati
Page 149 and 150:
choose (unconstrained, minimum) to
Page 151 and 152:
and semiannual effects for some sta
Page 153 and 154:
Zumberge, J. F, M.B. Heflin, D.C. J
Page 155 and 156:
Africa/Arabia : BAHR r,e,n,s Z12 0.
Page 157 and 158:
However there will be something lik
Page 159 and 160:
TROM TSKB VILL WES2 WTZR YAR1 YELL
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Sigma CAS1 DAV1 MCM4 OHIG KERG Mean
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Example #1: Minimum datum (rotation
Page 165 and 166:
APPENDIX VI SUGGESTIONS AND DISCUSS
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Table 1: 7 parameter orbit and stat
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ITRF96 AND FOLLOW ON FOR 1998 Claud
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Table 1. Global ITRF96 residuals pe
Page 173 and 174:
INTRODUCTION IGS REFERENCE STATIONS
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Class D: Velocity residuals larger
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(MCM466001MO03). These stations sho
Page 179 and 180:
ABSTRACT ESTIMATION OF NUTATION TER
Page 181 and 182:
that the VLEII formal errors will o
Page 183 and 184:
with oj denoting a combination of t
Page 185 and 186:
Figure 5. 0.20 0.15 0.10 0.05 0.00
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GLOBALLY CONSISTENT RIGID PLATE MOT
Page 189 and 190:
I The velocity of a point that is f
Page 191 and 192:
mass (which we assume to be Euler
Page 193 and 194:
otated into ITRF using a 14-paramet
Page 195 and 196:
can arise because the station actua
Page 197 and 198:
. In northern Algeria, convergence
Page 199 and 200:
Topic 4: IGS Products for Troposphe
Page 201 and 202:
that all coordinates refer to the s
Page 203 and 204:
GFZ are extracted for 90 days at th
Page 205 and 206:
15. ~2. CODE 9. 6. 3, 00 15. 12, 9.
Page 207 and 208:
10 4 8. 2. I 890. 893. 8%. 899. 902
Page 209 and 210:
18. 12. n 6. 2 ~ ‘“ N -6. -12.
Page 211 and 212:
L 10. I 5. r o. L-- 97250. 40. 35.
Page 213 and 214:
1. Verification of DWD Weather Fore
Page 215 and 216:
5. DAILY BKG SOLUTION, GREF PART, D
Page 217 and 218:
ESTIMATING HORIZONTAL GRADIENTS OF
Page 219 and 220:
ABSTRACT IGS PRODUCTS FOR THE IONOS
Page 221 and 222:
POTENTIAL PARTICIPANTS IN A ROUTINE
Page 223 and 224:
TOWARDS A COMBINED IGS IONOSPHERE P
Page 225 and 226:
GOALS AND NEXT STEPS For the near f
Page 227 and 228:
IONEX: The ionosphere Map EXchange
Page 229 and 230:
From method (1) to method (3), one
Page 231 and 232:
Reading and Writing IONEX Modules F
Page 233 and 234:
I I I I I I I I I contained in curr
Page 235 and 236:
Table 2: Ionosphere map file — da
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1000 1000 1000 1000 1000 1000 1000
Page 239 and 240:
1000 1000 1000 1000 1000 1000 1000
Page 241 and 242:
Table 2: Differential code biases
Page 243 and 244:
This equation can be rewritten in f
Page 245 and 246:
In practice, the combined biases (r
Page 247 and 248:
w o z w & LLl IL LL E DENT -BRUS (D
Page 249 and 250:
10.00 ‘ - — 5.00 ‘- -- 0.00
Page 251 and 252:
In a similar way as Wanninger (1994
Page 253 and 254:
anging fi-om a few minutes to sever
Page 255 and 256:
CONCLUSIONS The paper has outlined
Page 257 and 258:
ABSTRACT MONITORING THE IONOSPHERE
Page 259 and 260:
check and/or improve well-known ion
Page 261 and 262:
1990). Collecting more and more TEC
Page 263 and 264:
References Davies K., W. Degenhardt
Page 265 and 266:
The main part of the paper will the
Page 267 and 268:
One indicator of accuracy is the da
Page 269 and 270:
Figure 3: Global TEC map from GE fi
Page 271 and 272:
90 45 0 -45 -90 -100 -90 0 90 10< F
Page 273 and 274:
When comparing the TEC maps in Figu
Page 275 and 276:
Chapman Profile approach, thus prov
Page 277 and 278:
points, but represent the integral
Page 279 and 280:
Cosz cosine of slant range zenith d
Page 281 and 282:
if not linear - the unknown paramet
Page 283 and 284:
geometrical conditions can arise, a
Page 285 and 286:
Establishment of Linearized Observa
Page 287 and 288:
spending tracking data, the SST opt
Page 289 and 290:
THE ROLE OF GPS DATA IN IONOSPHERIC
Page 291 and 292:
(e.g., using the 40 and 360 MHz sig
Page 293 and 294:
Retrospective nowcasting Retrospect
Page 295 and 296:
(chairman: R. Leitinger, Austria, c
Page 297 and 298:
● ● ● ● 24-hour global iono
Page 299 and 300:
G .- 0 y 180 -150 -120 -90 -60 -30
Page 301 and 302:
E 9 .2 ?: j ~ ?4 ?30 ~“ ~z % :’
Page 303 and 304:
c c E c .- E! !2 %0 . m t 1 1 0 200
Page 305 and 306:
,$ ., L r 1 (a) TEc maps Figure8. 2
Page 307 and 308:
Rothacher, M., G. Beutler, E. Brock
Page 309 and 310:
Experiences of the BKG in Processin
Page 311 and 312:
RINEX N-l?ite for GPS modified Kepl
Page 313 and 314:
The combined SP3-fde includes also
Page 315 and 316:
1) Set up n single difference ambig
Page 317 and 318:
0.10 a) z g 0.06 0.02 Figure 5: Fra
Page 319 and 320:
[ 1) Compute triple difference resi
Page 321 and 322:
PRECISE AUTONOMOUS EPHEMERIS DETERM
Page 323 and 324:
ephemeris message will be computed
Page 325 and 326:
The solution to the problem can be
Page 327 and 328:
integration period, e.g. 5 minutes
Page 329 and 330:
LATITUDE (DEG) 9L . . 6& - ;+5 ,- o
Page 331 and 332:
First from the generation of the si
Page 333 and 334:
it is believed that, with dedicated
Page 335 and 336:
needed in order to use them as yard
Page 337 and 338:
close to the maximum. It was decide
Page 339 and 340:
Summary IGS Related Activities at t
Page 341 and 342:
Table 1. Point positioning using NR
Page 343 and 344:
ESA/ESOC IGS ANALYSIS CENTRE POSTER
Page 345 and 346:
ESTIMATION OF MANOEUVRES Manoeuvres
Page 347 and 348:
TROPOSPHERIC ESTIMATES Tropospheric
Page 349 and 350:
Sever (JPL) and Gerd Gendt (GFZ). S
Page 351 and 352:
A REVIEW OF GPS RELATED ACTIVITIES
Page 353 and 354:
2.5 2.0 1.5 ~ 1.0 % E 0.5 x 0.0 -0.
Page 355 and 356:
TEC from the CORS Network Figure 4
Page 357 and 358:
REFERENCES Cartwright, D.E., and R.
Page 359 and 360:
In recent years, the Bulletin A pol
Page 361 and 362:
frequency reference. A second recei
Page 363 and 364:
THE IGS REGIONAL NETWORK ASSOCIATE
Page 365 and 366:
IJJcl UKJ 4“’’’’’’’
Page 367 and 368:
W.-,-,- ,,, IJJ3 d , , , ,. . . . !
Page 369 and 370:
Variations of weekly SIR R solution
Page 371 and 372:
Page 373 and 374:
Page 375 and 376:
w’ —— L .sT41w.!l. c8Q#_. .J
Page 377 and 378:
T HE N EWCASTLE G LOBAL N ETWORK A
Page 379 and 380:
6 5 4 23 2 1 0 S TRATEGY Figure 2:
Page 381:
IGS Workshop Dinner, Jagschloss Kra
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