SECCHI schedules, Dec 2021
SECCHI 2 hour block schedules beginning on 02/19/2021
210214_0.bsf 47kbps
| SSR1 Images | SSR1 MB | SSR2 images | SSR2 MB | 00 block images | SSR1 MB | |
|---|---|---|---|---|---|---|
| EUVI 171 | 1 | 70 | long exp ICER0 | |||
| EUVI 195 | 46 | long exp ICER0 | ||||
| EUVI 284 | 1 | 15 | ICER0 | |||
| EUVI 304 | 12 | 19.164 | 34 | 28.46 | ICER0 | 25.844 |
| COR2 Seq | 6 | |||||
| COR2 Double | 8 | 7.706 | Deep exp Double | 8.333 | ||
| COR1 | 72 | 7.554 | 7.239 | |||
| HI_1 | 3 | 5.269 | Full res | 8.992 | ||
| HI_2 | 1 | 2.288 | Full Res | 6.011 | ||
| Total MB | 41.981 | 28.46 | 56.419 |
210214_2.bsf 39kbps
| SSR1 Images | SSR1 MB | SSR2 images | SSR2 MB | 00 block images | SSR1 MB | Changes to reduce volume | |
|---|---|---|---|---|---|---|---|
| EUVI 171 | 1 | 70 | |||||
| EUVI 195 | 24 | 2:30 to 5:00 min cadance | |||||
| EUVI 284 | 1 | 15 | |||||
| EUVI 304 | 12 | 12.262 | 34 | 28.46 | 11.948 | ||
| COR2 Seq | 6 | ||||||
| COR2 Double | 8 | 7.706 | Deep exp Double | 8.333 | |||
| COR1 | 72 | 7.554 | 7.239 | ||||
| HI_1 | 3 | 5.269 | 5.269 | ||||
| HI_2 | 1 | 2.288 | 2.288 | ||||
| Total MB | 35.079 | 28.46 | 35.077 |
210214_4.bsf 33kbps
| SSR1 Images | SSR1 MB | SSR2 images | SSR2 MB | 00 block images | SSR1 MB | Changes to reduce volume | |
|---|---|---|---|---|---|---|---|
| EUVI 171 | 1 | 70 | |||||
| EUVI 195 | 24 | 2:30 to 5:00 min cadance | |||||
| EUVI 284 | 1 | 15 | |||||
| EUVI 304 | 12 | 12.262 | 34 | 28.46 | 11.948 | ||
| COR2 Seq | 6 | ICER3 to ICER6 | |||||
| COR2 Double | 8 | 2.694 | Deep exp Double | 3.321 | ICER3 to ICER6 | ||
| COR1 | 72 | 7.554 | 7.239 | ||||
| HI_1 | 3 | 5.269 | 5.269 | ||||
| HI_2 | 1 | 2.288 | 2.288 | ||||
| Total MB | 30.067 | 28.46 | 30.065 |
Summary of 120kbps blocks (begins 2012/11/04 on Behind):
(2012/04/30)
Table showing relative Icer compression factors is here.
(change from previous)
| MB/day | ID | Cadence (minutes) & Compr | w/SSR 2 |
|---|---|---|---|
| 450 | 120kbps/12 | = 160kbps/16 below | |
| 388 | 120kbps/14 | = 160kbps/18 below | |
| 282 | 120kbps/19 | = 160kbps/24 below | |
| 241 | 120kbps/23 | = 160kbps/30 below | |
| 201 | 120kbps/27 | ||
| EUVI 195 | 5->10 | ||
| COR 1 SEQ | 20->60 | ||
| 126 | 120kbps/30 (emergency use only) | ||
| EUVI 195 | (Icer7) | ||
| COR 1 SEQ | 120 | ||
| COR 1 IMG | 10 | ||
| COR 2 SEQ | None | ||
| COR 2 IMG | 30 | ||
| HI 1 | 120 | ||
Summary of 160kbps blocks:
(2011/06/27)
(change from 240kbps/22 below)
| Cadence (minutes) & Compr | w/SSR 2 | |
|---|---|---|
| 160kbps/16 | = 240kbps/22 below | |
| 160kbps/18 | ||
| COR 2 SEQ 2048->1024 | (Icer6) | |
| COR 2 IMG 2048->1024 | (Icer6) | |
| 160kbps/24 | ||
| EUVI 304 | 120 | |
| EUVI 195 | (Icer6) | |
| COR 1 SEQ | 10 | |
| COR 1 IMG (interleaved) | 10 | |
| 160kbps/30 | ||
| HI 1 | 60 | |
| COR 1 SEQ | 20 | |
| COR 1 IMG | 5(3/4) | |
| COR 2 SEQ | 120 | |
| COR 2 IMG | 15(7/8) | |
Summary of 240kbps Blocks in Use:
(2010/07/26)
| Cadence (minutes) & Compr | w/SSR 2 | |
|---|---|---|
| 240kbps/18 (=360kbps/22) | ||
| EUVI 195 | 2.5 (Icer5) | |
| EUVI 304 | 10 (Icer5) | 2.5 (Icer5) |
| EUVI 284 | 120 (Icer6) | 5 (Icer6) |
| EUVI 171 | 120 (Icer4) | 1.25(Icer6) |
| COR 2 IMG | 15(3/4) (Icer3) | |
| COR 2 SEQ | 60 (Icer3) | |
| COR 1 SEQ | 5 (Icer7) | 2.5(Icer7) |
| HI 1 | 40 | |
| HI 2 | 120 | |
| Change from previous: | ||
| 240kbps/22 (=360kbps/30) | ||
| EUVI 195 | 5 | |
| 240kbps/30 | ||
| EUVI 195 | (Icer6) | |
| EUVI 304 | 120 | |
| 240kbps/51 (=240kbps/30/120/reduced) | ||
| EUVI 195 | 10 | |
| COR 2 IMG | 30 | |
| COR 2 SEQ | None | |
| COR 1 SEQ | 20 | |
| HI 1 | 60 | |
| Not in use: | ||
| 240kbps/25 (=360kbps/36) | ||
| COR 1 SEQ | 10 | |
| 240kbps/31 | ||
| EUVI 195 | 10 (Icer5) | |
| EUVI 304 | 2.5(3/4) | |
Schedule Predicts
Beginning in May 2010 there was a lot of contention with other missions for STEREO-Behind. Here is a plot of actual and predicted daily scheduled volume as of 6/7/10:
360kbps -> 240kbps
Behind changed to 240kbps on 2009/12/07. Ahead changes in April 2010. Here is a PDF file which has two tables: summary of SECCHI playback at various rates through 96kbps, and affect on SSR-2 pb if SSR-1 pb decreased; and summary of telemetry reduction options discussed on 2009/11/23.
480kbps -> 360kbps
Beginning on 2009/08/17, the SECCHI program on both spacecraft started using new schedules optimized for the 360kbps downlink mission phase. The primary difference between the 480kbps schedule is that the EUVI program is now dominant in 195A instead of 171A. Below is a summary of Differences between the new 360kbps/22hr schedule and old 480kbps/22hr schedule. Also noted are the differences between the 22hr, 30hr, and 36hr blocks. These are for SSR 1 images only.
HI
COR 2
Polarized sequence 1 per hour (00:08:15 01:08:15) Doubles 3 per hour (00:24:00 00:39:00 00:54:00) Event Detect 2 per hour (00:24-00:08, 00:54-00:39)
Polarized sequence 2 per hour (00:22:00 00:52:00) Doubles 2 per hour (00:07:30 00:37:30)
COR 1
EUVI
-
- No change; same in 30hr, 36hr blocks
- 360kbps (schedule times)
- 480kbps (schedule times)
- Same in 30hr,36hr blocks
- No change; Same in 30hr.
- In 36hr: cadence decreases from 5 to 10 min.
- EUVI 195A: 2.5 minute cadence from a 10 minute cadence
- EUVI 171A: 120 minute cadence from a 2.5 minute cadence
- EUVI 304A: No change
- EUVI 284A: 120 minute cadence from a 20 minute cadence
- In 30hr&36hr: decrease 195A cadence from 2.5 to 5 min.