GSC Sentinel-2 PDGS OCD - Emits - ESA

More documents

Recommendations

Info

GSC Sentinel-2 PDGS OCD Issue 1 Revision 2 (draft) - 25.07.2010 GMES-GSEG-EOPG-TN-09-0008 page 90 of 350 Over oceans or open seas, the WGS84 geoid altitude is considered. Presently WGS 84 uses the 1996 Earth Gravitational Model (EGM96) geoid, revised in 2004. Over land and inland waters, the altitude information is given with respect to the geoid altitude reference EGM96. 4.3.9.3 Data Compression versus Data Quality Trade-Off Constraints An average acquisition of 6640 km along the Sentinel-2 orbit will amount to about 60GBytes of on-board compressed raw instrument data. Therefore the daily amount of compressed data received on-ground will result to about 887GB per satellite. Besides issues related to data processing and storage, these large volumes raise a non-negligible constraint for the efficient dissemination of final products to end users. Indeed, it was computed that a Sentinel-2 square image of 290km x 290km comprehensive of all spectral bands will weight around 7.4 GBytes without any compression. Hence, a data-compression step is provisioned for at the term of the MSI processing cycle. Nevertheless, data-compression shall be controlled such as to avoid jeopardizing image quality. To this end, a preliminary trade-off analysis based on the standard JPEG2000 compression algorithm is reported in [RD-30] to support the optimal selection of this compression step. 4.3.10 CONSTRAINTS AND DEPENDENCIES DRIVEN BY THE CGS NETWORK As a matter of fact, the CGS network that will support the PDGS operations is at this stage not settled. This section reviews the constraints and dependencies associated. 4.3.10.1 Near-Real-Time Data Timeliness The large MSI mission data-rate and global acquisition plan coupled with the available CGS network selected to recover the payload data on-ground will constrain the amount and data that can be provided with NRT timeliness, while ensuring that all data can be provided within a day. Based on [AD-03], it is assumed that about 25% of the globally acquired data by one spacecraft can be downlinked with NRT-compatible timeliness when using a suitable CGS network of 4 stations. It was also calculated that a payload data recovery plan leading to 100% of NRT-compatible timeliness can be obtained using a network of about 6 complementary ground-stations. Figure 4-6 extracted from [RD-19] depicts the distribution of the age of the data at the time it is acquired on-ground, without zone prioritization for NRT playback, and considering a CGS network composed of the Kiruna, Svalbard, Maslapomas, and Prince-Albert stations. In this simulation, the globally averaged timeliness amounts to 6.298 hours at data-reception time. When using the NRT priority downlink functionality outlined in section 4.5.4.2.2 ensuring that specific zones are acquired with NRT-compatible latencies, the remaining global timeliness distribution may be altered significantly; Figure 4-7 shows that in the same 4 stations scenario, prioritizing Europe for NRT timeliness makes the geographical distribution of data age vary meaningfully with respect to the routine scenario. 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 91 of 350 Figure 4-6 Average age of the sensor data (in hours) at the time of acquisition on-ground at a CGS network composed of Kiruna, Svalbard, Maslapomas, and Prince-Albert stations Figure 4-7 Summer distribution of the data-age at the time of acquisition on-ground with Europe promoted for availability with NRT-compatible timeliness The latency over Europe does not exceed 4 hours (the major part with an age inferior than 2 hours), but the longest latency appears in new zones like South of Africa and areas near Iran. In this scenario, the maximum data latency value has increased to 7.6878 hours instead of 6.3 hours obtained for the routine scenario. 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: GSC Sentinel-2 PDGS OCD Issue 1 Rev
Page 37 and 38: LES LGS Land Equipped Sites Local G
Page 47 and 48: 3.5.2 MULTI-SPECTRAL INSTRUMENT CHA
Page 67 and 68: ESA UNCLASSIFIED - For Official Use
Page 85: 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 137 and 138:
Page 139 and 140:
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?