1 / 11

MDP / DHU - DR Usage vs downlinks -

MDP / DHU - DR Usage vs downlinks -. Keiichi MATSUZAKI (ISAS). Data Flow from Telescope to Ground. Software guard for total volume in certain period is possible. Buffer. 12Mbps. SOT. SOT. 1400kbps (2000). ~2.4Gbits /downlink (4Mbps). 64Mbits. Bit Comp. + Image Comp. 3Mbps.

deo
Download Presentation

MDP / DHU - DR Usage vs downlinks -

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MDP / DHU - DR Usage vs downlinks - Keiichi MATSUZAKI (ISAS)

  2. Data Flow from Telescope to Ground Software guard for total volume in certain period is possible Buffer 12Mbps SOT SOT 1400kbps (2000) ~2.4Gbits /downlink (4Mbps) 64Mbits Bit Comp. + Image Comp. 3Mbps DR XRT XRT 300kbps (0) >5Gbits 64Mbits 2Mbps EIS EIS 300kbps (0) 64Mbits MDP DHU Earth

  3. Pre-flare (mode trigger) bufferfor XRT Normal (FIFO 16Mbit) Ring-1 12PFI Ring-2 18PFI Ring-3 28PFI Quiet mode Flare mode PFI < 256x256 (for larger image # of image decrease)

  4. Data Recorder • Simple ring buffers (size > 8.0 Gbits) • One partition for SOT, XRT & EIS (+MDP) • One partition for S/C • No priority control • Stop or overwrite @ full (selectable) • Simultaneous Recording & Downlink • One partition for downlink Record (Write Pointer) Play back (Read Pointe)r

  5. Down link • 4Mbps(X-band) • Bottle neck for total amount of data • 32kbps(S-band) - For S/C • 150 minutes of down-link / day • 4 KSC + 12 Polar stations / day • 2.4Gbits/downlink, ave. recording rate 400kbps

  6. SOT 1400Mbits (70%) FG 1100Mbits (55%) SP 300Mbits (15%) XRT 300Mbits (15%) Partial Frame 225Mbits (11.25%) Full Frame 75Mbits (3.75%) EIS 300Mbits (15%) Example ofSharing of Telemetry (per downlink) • Ratio can be modified in Weekly Observation Meeting depending on campaign

  7. Example 1Constant Rate with Clean up of DR Play back 250kbps = 8 pass/day 1Rev. 2Rev.

  8. Example 2Burst Rate with Clean up of DR Play back 2000kbps Total 20min Stop Obs. Stop Obs. Stop

  9. Daily Allocation for Chief Observer 2003/2/4 10:00:00 2.5 2003/2/4 12:00:00 2.5 2003/2/4 14:00:00 2.5 2003/2/4 10:00:00 3.2 2003/2/4 12:00:00 3.2 2003/2/4 14:00:00 3.2 Downlink start time Allocated Volume for Planning Limit Set by MDP for telemetry guard Format is TBD

  10. Example 3Mixed Case, Empty out of DR

  11. Example 4Average Rate ~ day • Margin for uncertainty • Flare event • Compression Result 2000kbps合計20分 DR size = 8.0G bits 休止 観測 休止 観測 休止

More Related