ECS Measurement SI Mode Trends



Statistics Run Date: 2018Mar12

  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) 30400 68400 76000
Total Actual Time (secs) 27744 60010 64662
Delta From Expected (secs) -2656.00 -8390.00 -11338.00
% of Expected Total (secs) 91.26% 87.73% 85.08%

Cold ECS Time:

ECS Trending Table: Cold Time
Stats TE_007AC TE_007AE TE_00B26
Total Exp. Cold Time (secs) 18240.0 41040.0 45600.0
Total Actual Cold Time (secs) 0 17967 22702
Delta From Expected (secs) -18240.00 -23072.26 -22897.27
% of Exp. Cold Total (secs) 0.00% 43.78% 49.79%


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 4 27744.00 6936.00
TE_007AE 8 50293.00 6286.62
TE_00B26 9 59945.00 6660.56
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 4717.00 4717.00
TE_00CA8 1 9717.00 9717.00
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) 38000 91200 91200
Total Actual Time (secs) 32460 77836 74662
Delta From Expected (secs) -5539.00 -13363.00 -16538.00
% of Expected Total (secs) 85.42% 85.35% 81.87%

Cold ECS Time:

ECS Trending Table: Cold Time
Stats TE_007AC TE_007AE TE_00B26
Total Exp. Cold Time (secs) 22800.0 54720.0 54720.0
Total Actual Cold Time (secs) 0 28871 27780
Delta From Expected (secs) -22800.00 -25848.82 -26939.42
% of Exp. Cold Total (secs) 0.00% 52.76% 50.77%


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 5 32461.00 6492.20
TE_007AE 10 63289.00 6328.90
TE_00B26 11 69945.00 6358.64
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 4717.00 4717.00
TE_00CA8 2 14548.00 7274.00
4 Chip SI Modes
TE_00C62 0 0.00 0.00


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) 3792400 3822800 3838000
Total Actual Time (secs) 4140555 4095113 4214000
Delta From Expected (secs) 348155.52 272313.04 376000.65
% of Expected Total (secs) 109.18% 107.12% 109.80%

Cold ECS Time:

ECS Trending Table: Cold Time
Stats TE_007AC TE_007AE TE_00B26
Total Exp. Cold Time (secs) 2275440.0 2293680.0 2302800.0
Total Actual Cold Time (secs) 2012159 1989097 1941158
Delta From Expected (secs) -263280.84 -304582.06 -361641.82
% of Exp. Cold Total (secs) 88.43% 86.72% 84.30%


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 491 4036472.52 8220.92
TE_007AE 494 4022319.04 8142.35
TE_00B26 496 4037627.93 8140.38
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 14 112929.00 8066.36
TE_00CA8 9 72794.00 8088.22
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