GSC Sentinel-2 PDGS OCD - Emits - ESA

More documents

Recommendations

Info

4.3.10.4 X-Band Downlink Conflicts between Sentinel Missions GSC Sentinel-2 PDGS OCD Issue 1 Revision 2 (draft) - 25.07.2010 GMES-GSEG-EOPG-TN-09-0008 page 94 of 350 As it has been the case for the TMTC interface to the Sentinel spacecrafts in S-Band leading to the pre-defined allocation described in section 4.3.7.1, potential conflicts among Sentinels are also anticipated for the share of X-Band resources considering that: ○ The GSC aims for maximised common and interoperable usage of ground-segment resources. This particularly applies to the Sentinels and to the common use of X-Band ground-stations; ○ X-Band LEO-capable ground-stations are considered a scarce resource considering the overall number of EO missions in flight, the required locations of ground-stations and the investments they represent; ○ The data-rates introduced by the Sentinel missions and the dual spacecraft approach for each mission require overall a very large number of X-Band station contacts to recover the data on-ground; ○ The mitigation of the required X-Band downlink resources via the use of EDRS are at this stage only considered as a potential future evolution. In this respect, an on-going analysis is performed by ESA and concludes in a preliminary analysis report [RD-29], that manageable but non-negligible X-Band access conflicts are to be expected to support the increased volumes brought in by the Sentinels. The X-Band downlink conflicts across the Sentinels missions can be classified as follows: Signal interferences on ground when performing simultaneous X-Band downlinks: due to the X-Band shared frequencies and different orbit cycles of the Sentinels, simultaneous X-Band operations can produce seldom RF interferences; Ground-stations resource conflict: in which the spacecrafts visibility over a groundstation do not constrain simultaneous RF activities but the available allocated onground resources (i.e. antennas availability); The Sentinel-2 PDGS will hence account for these constraints when planning the mission data downlinks to CGS and LGS such that: Sentinel-2 X-Band transmission activities during specific periods can be precluded due to other Sentinels (Sentinel-1 and/or Sentinel-3) conflicting X-Band activities having priority during those periods; Among all X-Band downlink opportunities offered by the CGS network for Sentinel-2, some can be precluded or shortened by configuration due to prioritised access to the CGS available antennas by other Sentinels; It is assumed [Assumption-19] that based on the CGS and LGS networks, a conflict-free coordination among Sentinels will result in a predefined definition of the above constraints applicable to each Sentinel satellite in orbit. ESA UNCLASSIFIED – For Official Use © ESA The copyright of this document is the property of ESA. It is supplied in confidence and shall not be reproduced, copied or communicated to any third party without written permission from ESA.
GSC Sentinel-2 PDGS OCD Issue 1 Revision 2 (draft) - 25.07.2010 GMES-GSEG-EOPG-TN-09-0008 page 95 of 350 4.3.10.5 Contact Overlap Management Constraints Specific operation constraints of the CGS network may have to be considered for optimisation purposes related to the management of overlapping downlink opportunities within the network. Although mostly applying to the case of complementary polar X-Band CGSs more inclined to share a common coverage of the LEO orbit (e.g. Svalbard, Kiruna, Tromsoe, etc), optimisation may have to be generalised in particular for the relative apportioning of X-Band ground-station contacts with respect to time-overlapping data-relay contacts when EDRS capabilities will be included. 4.3.11 CONSTRAINTS AND DEPENDENCIES DRIVEN BY THE EDRS EXPLOITATION SEGMENT Besides the constraints strictly linked to the use of the OCP (cf. section 4.3.8.6), the multimission intended usage of EDRS, in particular regarding its parallel usage by the Sentinel-1 and Sentinel-2 missions imposes that access to the EDRS resource is apportioned between Sentinel-1 and Sentinel-2. For this purpose, the PDGS accounts for a specific interface to the EDRS exploitation segment (cf. section 4.2.1). As per the current assumptions described in sections 3.7.1, a constellation of a TBD number of EDRS relay spacecrafts is considered, each one characterised by a given position on the GEO orbit and with identical characteristics in terms of data-rate supported (520Mbps end-toend) and required reception hardware on-ground. It is further assumed that the apportioned availability of the EDRS constellation to Sentinel-2 will be pre-defined at static times phased along the Sentinel-2 orbit repeat cycle, following a preliminary agreement with the EDRS exploitation segment in coordination with Sentinel-1. The above elements will drive the PDGS operations regarding the planned mission evolution specific to Sentinel-2 introduced previously in paragraph 3.7.2. ESA UNCLASSIFIED – For Official Use © ESA The copyright of this document is the property of ESA. It is supplied in confidence and shall not be reproduced, copied or communicated to any third party without written permission from ESA.
Page 1 and 2:
document title/ titre du document P
Page 3 and 4:
GSC Sentinel-2 PDGS OCD issue 1 rev
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
GSC Sentinel-2 PDGS OCD Issue 1 Rev
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
[RD-33] Sentinel-2 MSI - Level 2A A
Page 35 and 36:
Page 37 and 38:
LES LGS Land Equipped Sites Local G
Page 39 and 40: GSC Sentinel-2 PDGS OCD Issue 1 Rev
Page 47 and 48: 3.5.2 MULTI-SPECTRAL INSTRUMENT CHA
Page 67 and 68: ESA UNCLASSIFIED - For Official Use
Page 89: GSC Sentinel-2 PDGS OCD Issue 1 Rev
Page 97 and 98: Table 4-5 Radiometric image quality
Page 99 and 100: Product- Type On-Line retention Off
Page 103 and 104: 4.5.1.5 Scalability and Flexibility
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
ESA UNCLASSIFIED - For Official Use
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
4.6.3 OPERATIONAL TRANSFER BASELINE
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Product- Type Identifier S2MSI0 S2M
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
5 PDGS DESIGN GSC Sentinel-2 PDGS O
Page 193 and 194:
Page 195 and 196:
Page 197 and 198:
Page 199 and 200:
Page 201 and 202:
Page 203 and 204:
Page 205 and 206:
Page 207 and 208:
○ Effective processing resources
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Page 231 and 232:
o preserving integrity of exchanged
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
Page 243 and 244:
6 DETAILED OPERATIONS CONCEPTS GSC
Page 245 and 246:
o Report generation frequency and c
Page 247 and 248:
Page 249 and 250:
Page 251 and 252:
○ MSI L1A, L1B, L1C and TCI produ
Page 253 and 254:
Page 255 and 256:
Page 257 and 258:
Page 259 and 260:
Page 261 and 262:
Page 263 and 264:
Page 265 and 266:
Page 267 and 268:
Page 269 and 270:
Page 271 and 272:
Page 273 and 274:
Page 275 and 276:
Page 277 and 278:
Page 279 and 280:
Page 281 and 282:
Page 283 and 284:
Page 285 and 286:
Page 287 and 288:
Page 289 and 290:
Some relevant use cases are present
Page 291 and 292:
Page 293 and 294:
Page 295 and 296:
Page 297 and 298:
Page 299 and 300:
Page 301 and 302:
Page 303 and 304:
Page 305 and 306:
Page 307 and 308:
Page 309 and 310:
Page 311 and 312:
Page 313 and 314:
Page 315 and 316:
Page 317 and 318:
Page 319 and 320:
Page 321 and 322:
Page 323 and 324:
Page 325 and 326:
Two main mapping services have been
Page 327 and 328:
The requirement on the cloud covera
Page 329 and 330:
Page 331 and 332:
Page 333 and 334:
Page 335 and 336:
Page 337 and 338:
Page 339 and 340:
Page 341 and 342:
Page 343 and 344:
Page 345 and 346:
show all

GSC Sentinel-2 PDGS OCD - Emits - ESA

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?