ECS Measurement SI Mode Trends



Statistics Run Date: 2017Oct16

  1. Introduction
  2. Rolling Monthly
  3. Since Start of Current Epoch
  4. Since Mid 2012
  5. Important Notes

I. Intro

This web page will help you track ECS measurement performance with regard to
total time on each of the three SI modes as well as the amount of the total time that
was cold (i.e. temperatures <= -118.7 degress C).


The present targets for the Total and Cold times are:

    Total time per SI Mode per measurement: 7600.0 seconds
    Fraction of total time the measurement should be cold: 60.0%
Back To Top

II. Rolling Monthly

Total ECS Time:

ECS Trending Table: Total Time
Stats TE_007AC TE_007AE TE_00B26
Total Expected Time (secs) 45600 53200 76000
Total Actual Time (secs) 49772 52753 73391
Delta From Expected (secs) 4172.00 -447.00 -2609.00
% of Expected Total (secs) 109.15% 99.16% 96.57%

Cold ECS Time:

ECS Trending Table: Cold Time
Stats TE_007AC TE_007AE TE_00B26
Total Exp. Cold Time (secs) 27360.0 31920.0 45600.0
Total Actual Cold Time (secs) 24969 17862 30979
Delta From Expected (secs) -2390.23 -14057.07 -14620.65
% of Exp. Cold Total (secs) 91.26% 55.96% 67.94%


ECS Trending Table: SI Mode Stats
SI Mode Total Number of Obs. Total Exposure Time (sec) Average Exposure (sec/obs)
Primary 6 Chip SI Modes
TE_007AC 6 49772.00 8295.33
TE_007AE 7 52753.00 7536.14
TE_00B26 10 73391.00 7339.10
Old 6 Chip SI Modes
TE_00216 0 0.00 0.00
TE_0021C 0 0.00 0.00
TE_008EA 0 0.00 0.00
5 Chip SI Modes
TE_00C60 0 0.00 0.00
TE_00CA8 0 0.00 0.00
4 Chip SI Modes
TE_00C62 0 0.00 0.00


Back To Top

III. Statistics Since the Start of the Current Epoch

Total ECS Time:

ECS Trending Table: Total Time
Stats TE_007AC TE_007AE TE_00B26
Total Expected Time (secs) 129200 121600 174800
Total Actual Time (secs) 122257 112218 187674
Delta From Expected (secs) -6943.00 -9382.00 12874.23
% of Expected Total (secs) 94.63% 92.28% 107.37%

Cold ECS Time:

ECS Trending Table: Cold Time
Stats TE_007AC TE_007AE TE_00B26
Total Exp. Cold Time (secs) 77520.0 72960.0 104880.0
Total Actual Cold Time (secs) 69164 43570 104904
Delta From Expected (secs) -8355.56 -29389.55 24.40
% of Exp. Cold Total (secs) 89.22% 59.72% 100.02%


ECS Trending Table: SI Mode Stats
SI Mode Total Number of Obs. Total Exposure Time (sec) Average Exposure (sec/obs)
Primary 6 Chip SI Modes
TE_007AC 17 122257.00 7191.59
TE_007AE 15 106125.00 7075.00
TE_00B26 21 145252.00 6916.76
Old 6 Chip SI Modes
TE_00216 0 0.00 0.00
TE_0021C 0 0.00 0.00
TE_008EA 0 0.00 0.00
5 Chip SI Modes
TE_00C60 1 7532.00 7532.00
TE_00CA8 1 6093.00 6093.00
4 Chip SI Modes
TE_00C62 1 34890.23 34890.23


Back To Top

IV. Statistics Since Mid 2012

Total ECS Time:

ECS Trending Table: Total Time
Stats TE_007AC TE_007AE TE_00B26
Total Expected Time (secs) 3549200 3534000 3526400
Total Actual Time (secs) 3884786 3803402 3898451
Delta From Expected (secs) 335586.52 269402.04 372051.65
% of Expected Total (secs) 109.46% 107.62% 110.55%

Cold ECS Time:

ECS Trending Table: Cold Time
Stats TE_007AC TE_007AE TE_00B26
Total Exp. Cold Time (secs) 2129520.0 2120400.0 2115840.0
Total Actual Cold Time (secs) 1938090 1898161 1842782
Delta From Expected (secs) -191429.39 -222238.27 -273057.48
% of Exp. Cold Total (secs) 91.01% 89.52% 87.09%


ECS Trending Table: SI Mode Stats
SI Mode Total Number of Obs. Total Exposure Time (sec) Average Exposure (sec/obs)
Primary 6 Chip SI Modes
TE_007AC 465 3831509.52 8239.81
TE_007AE 463 3787592.04 8180.54
TE_00B26 460 3760269.93 8174.50
Old 6 Chip SI Modes
TE_00216 5 478338.25 95667.65
TE_0021C 0 0.00 0.00
TE_008EA 0 0.00 0.00
5 Chip SI Modes
TE_00C60 3 23932.00 7977.33
TE_00CA8 2 15810.00 7905.00
4 Chip SI Modes
TE_00C62 3 167526.73 55842.24


Back To Top





Important Notes:

A word about the TOTAL Time stats:

    - The Total Expected Time values in the table below is calculated by taking the number of actual observations for each SI Mode and multiplying it by 7600.0.
    - Total Actual Time is the sum of all actual ECS measurement time for each of the three SI Modes.
    - % Expected Total is the fraction of the expected that we actually achieved, or:

         (Total Actual Time / Total Expected Time) * 100.0

A word about the COLD Time stats:

    - The Total Expected Cold Time value in the table below is 60.0% of the Total Expected Time (see Table above).
    - Total Actual Cold Time is the sum of all time during each measurement where the temperature was <= -118.7 degrees C
    - % of Expected Total is the fraction of the Total Expected Time achieved

SI Mode Mapping between 6,5 and 4 chip modes:

    The 6 chip SI Modes consist of three distinct modes. But there are only 2, 5 chip SI Modes and only one 4 chip SI mode. To make tracking feasible, the 4 and 5 chip modes were mapped into the 6 chip modes in the following manner:

     6 chip 5 chip 4 chip

    TE_007AC -> TE_00C60 TE_00C62

    TE_00B26 -> TE_00C60 TE_00C62

    TE_007AE -> TE_00CA8

All of the TE_00CA8s get counted as TE_007AE

Half of the TE_00C60s get counted towards TE_007AC and the other half get counted with the TE_00B26s

Half of the TE_00C62s get counted towards TE_007AC and the other half get counted with the TE_00B26s.

So watchout for TE_00B26 over-representation.

Back To Top