CAPS Data Products Definition                                                                    Rev. 8/10/2001

 

The following data products are generated once each A–cycle (32 s).

 

IBS and ELS: Each table entry indicates the number of data products generated in each category. The 16 kbps entry always contains the maximum number of products available in a data category (listed in the column headings). Where this number is smaller than the 16 kbps entry, the data have been AVERAGED over adjacent channels and the entry indicates the resulting number of products. Multiplying adjacent entries in a given row gives the number of products (or bytes) in a particular mode (last column). Many of the data products formerly listed under “snapshot” are in fact collapsed products and are now listed that way.

 

IMS SINGLES, LOGICALS, and ION data products are generated according to the same rules as IBS and ELS---all data entries represent averages taken over adjacent channels.

 

IMS EN x TOF data products are formed differently. The TOF data products are AVERAGED over adjacent TOF channels. This is shown explicitly in the TOF table. Energy spectra collapses across TOF channels, on the other hand, are SUMMATIONS rather than averages.

 

Note that (*) indicates the definition of a telemetry mode implemented in the new flight software for ICO2 and Jupiter and (**) indicates the definition of telemetry modes currently in use (2/25/00).

 

 

IMS TDC SINGLES

 

Logical

Data Rate

___          Snapshot_________

      E              EL            AZ

___              Collapse________

       E               EL            AZ

Bytes /

A- cycle

16**

63

8

8

---

---

---

4032

2**

 

 

 

16

4

2

128

1*

---

---

---

---

---

---

0

0.5*

---

---

---

---

---

---

0

0.25*

---

---

---

---

---

---

0

(**) indicates current definition; (*) indicates planned modes and definitions for new FSW load:

(***) AZ=3 indicates an average over 3, 3, and 2 adjacent energy spectra.

 

 

 

 

 

 

 

 

 

 

IMS TDC LOGICALS

 

Logical

Data Rate

_              Snapshot________

      E            LOG           AZ

____           Collapse_________

       E            LOG             AZ

Bytes

A- cycle

16**

63

4

8

---

---

---

2016

2**

 

 

 

16

4

2

128

1*

---

---

---

---

---

---

0

0.5*

---

---

---

---

---

---

0

0.25*

---

---

---

---

---

---

0

(**) indicates current definition; (*) indicates planned modes and definitions for new FSW load

 

 

 

 

IMS ION

 

Logical

Data Rate

___              Snapshot_________

    E            EL         AZ       ION

_________Collapse_________

   E            EL        AZ        ION

Bytes /

A – cycle

16**

63

8

8

7

---

---

---

---

28224

2**

 

 

 

 

63

4

2

6

3024

 1*

 

 

 

 

32

4

1

2***

256

0.5*

 

 

 

 

32

4

1

2***

256

0.25*

 

 

 

 

32

4

1

2***

256

 (*) Indicates mode definitions for new FSW load. (**) Indicates current definition.

 (***) The 2 IONs are H+ST & He2+ST.

 

 

 

IMS TOF

 

Logical

Data Rate

            _   LEF   _            _

 E             TOF          Bytes

              ___ST_________

E                TOF        Bytes

Bytes /

A - cycle

A - cycles/ B - cycle

16**

4(S2)

512

2

4(S2)

512

2

8192

8

2**

2(S2)

256(A2)

2

2(S2)

256

2

2048

16

1*

1(S2)

256(A2)

2

1(S2)

256

2

1024

32

0.5*

1(S2)

256(A2)

2

1(S2)

256

2

1024

32

0.25*

1(S2)

64(A8)

2

1(S2)

64

2

256

32

(**) indicates current definition; (*) indicates planned modes and definitions for new FSW load

Note: Complete E x TOF spectra (32E x 512 TOF) require 1 B – cycle.

 

 

ELS

 

Logical

Data Rate

          _ Snapshot______

E              EL              AZ

    _____ Collapse_______

 E              EL           AZ

Bytes /

A- cycle

16**

63

8

16

---

---

---

8064

2-SW*

8

8

16

63

8

1

1528

2-MAG*

---

---

---

63

8

4

2016

1*

---

---

---

63

8

3***

1512

0.5-SW*

---

---

---

32

8

1

256

0.5-MAG*

---

---

---

63

8

1

504

0.25*

---

---

---

32

8

1

256

(*) indicates planned modes and definitions for new FSW load; (**) indicates current definition;

(***)the AZ = 3 option indicates that the data products are averages over 5, 5, and 6 AZ channels

 

IBS

 

Logical

Data Rate

__     Snapshot_   __

  E          EL        AZ 

         Collapse____

   E          EL         AZ         

Bytes /

A – cycle

16**

255

3

16

---

---

---

12240

2-SW*

---

---

---

255

3

1

765

2-MAG*

---

---

---

128

3

1

384

1*

---

---

---

255

3

1

765

0.5-SW*

---

---

---

128

1

1

128

0.5-MAG*

---

---

---

---

---

---

0

0.25*

---

---

---

---

---

---

0

(**) indicates current definition; (*) indicates planned modes and definitions for new FSW load


SUMMARY (Bytes/ A – cycle)

 

 

Data

Products

                                       Logical Data Rate_____            _                       _

   16**         2SW*    2MAG*         1*      0.5MAG*    0.5SW*        0.25*

IMS TDC SING

4032

128

128

0

0

0

0

 

IMS TDC LOG

2016

128

128

0

0

0

0

 

IMS ION

28224

3024

3024

256

256

256

256

 

IMS TOF LEF

4096

1024

1024

512

512

512

128

 

IMS TOF ST

4096

1024

1024

512

512

512

128

 

ELS

8064

1528

2016

1512

504

256

256

 

IBS

12240

765

384

765

0

128

0

 

Science Total

62768

7621

7728

3557

1784

1664

768

 

Data Overhead

(dpid & sync)

14

14

14

10

8

10

8

 

ACT

68

0

0

0

0

0

0

 

A- cyc. Hdr.

24

24

24

24

24

24

24

 

HK

168

88

88

88

88

88

88

 

Check Sum

14

14

14

10

8

10

8

 

Science + CAPS overhead

63056

7761

7868

3689

1912

1796

896

 

CCSDS overhead

768

96

96

48

24

24

12

 

Subtotal

63824

7857

7964

3737

1936

1820

908

 

Spare

176

143

36

263

64

180

92

 

Total

64000

8000

8000

4000

2000

2000

1000

 

(*) indicates planned new modes; (**) indicates modes implemented

CCSDS overhead = ( truncate[(Science + CAPS overhead) / 988] + 1) * 12


 

Percentage Data Allocation by Sensor

 

Data Products

_                                     Logical Data Rate                        ___________

     16**         2SW*   2MAG*         1*          0.5MAG*      0.5SW*     0.25*

 

IMS

66.35

66.60

66.60

32.00

64.00

64.00

51.20

ELS

12.60

19.10

25.20

37.80

25.20

12.80

25.60

IBS

19.13

9.56

4.80

19.13

0.00

6.40

0.00

OH + HK + CCSDS

1.65

2.95

2.95

6.58

7.60

7.80

14.00

Spare

0.28

1.79

0.45

4.50

3.20

9.00

9.20