SHARAD DES

DOCUMENT TYPE: INTERFACE CONTROL DOCUMENT

TITLE: OST/PT/ODT STRUCTURE DEFINITION (SP-16)

DOCUMENT No.: TL 19765 PAGE: I of IV,17

PROJECT Ref.: ID-SHR-0001-LAB

ISSUE No.: 7

PREPARED BY: SHARAD TEAM

CHECKED BY: D. RAVASI

PROJECT LEADER: P. MARCHESI DATE:

PAPM: P. RUSCONI DATE:

PROGRAM MANAGER: E.ALIPPI DATE:

CONFIGURATION: L. E. RONDELLI

DATE FOR APPROVAL:


DISTRIBUTION LIST

POS.

NAME

DEPT.

N°

D. ADIROSI

ALENIA ROMA

E. ZAMPOLINI

ALENIA ROMA

F. MASSUSSI

ALENIA ROMA

F. BERNARDINI

ALENIA ROMA

P. MARCHESI

ALENIA LABEN

P. TOSTI

ALENIA LABEN

D. RAVASI

ALENIA LABEN

A. GANGEMI

ALENIA LABEN

M. VERGANI

ALENIA LABEN

L. SCANDELLI

ALENIA LABEN


CHANGE RECORD

Issue

Date

Sheet

Description of Change

Release

1

JULY '03

ALL

FIRST ISSUE OF THE DOCUMENT

PDR/SRR

2

OCT '03

ALL

Upgrade of requirements according to issue 2 of
[RD.1]

CDR

3

DEC '03

ALL

Upgrade of tables layout after HW / SW integration phase

EM CDR

4

MAR '04

ALL

Upgrade of TM/TC layout after MOM MIN/SHR/0116/ALS

SW CDR Close-out

5

MAY '04

ALL

Upgrade of PT for tracking purpose

6

JUNE '04

SRQD.- 3.2/050

Updated default values for PT, Added DCG parameters, added DTC Alive period

7

SEP. '04

ALL

Modification according to revision 2.4 of the software package


TABLE OF CONTENTS

1. INTRODUCTION......................................................................................................................... 1

1.1. PURPOSE......................................................................................................................... 1

2. APPLICABLE AND REFERENCE DOCUMENTS.......................................................................... 2

2.1. APPLICABLE DOCUMENTS............................................................................................... 2

2.2. REFERENCE DOCUMENTS............................................................................................... 2

3. OPERATION TABLES................................................................................................................ 3

3.1. OPERATIONAL SEQUENCE TABLE.................................................................................... 3

SRQD.-3.1/010 Operational Sequence Table........................................................................................... 3

SRQD.-3.1/020 Operational Sequence Default values........................................................................... 4

SRQD.-3.1/030 Operational Sequence Table Entries Format................................................................ 4

3.2. PARAMETERS TABLE....................................................................................................... 9

SRQD.- 3.2/010 Parameters Table.............................................................................................................. 9

SRQD.- 3.2/020 Parameters Table Categories......................................................................................... 9

SRQD.- 3.2/030 Parameters Table Value Types...................................................................................... 9

SRQD.- 3.2/040 Parameters Table Default Values................................................................................ 10

SRQD.- 3.2/050 Parameters Table Content............................................................................................ 11

3.3. ORBITAL DATA TABLE..................................................................................................... 15

SRQD.- 3.3/010 Orbital Data Table........................................................................................................... 15

SRQD.- 3.3/020 Orbital Data Table Default Values............................................................................... 15

SRQD.- 3.3/030 Orbital Data Table Format............................................................................................. 16

4. EEPROM LAYOUT................................................................................................................... 17


INTRODUCTION

This document presents the interfacing of DES towards its user.

Scientists operate on DES passing through the MRO C&DH on which Telecommands shall be stored before their issuing to DES.

Also TLM coming from DES, before arriving to Scientists, has an intermediate storage buffering into the MRO on-board Solid State Recorder.

PURPOSE

This document presents the structure of CMD TABLES used by Scientist to perform the DES Measurement Mode.

The document presents in chapter 3 the structure of:

. Operational Sequence Table

. Parameter Table

. Orbital Data Table


APPLICABLE AND REFERENCE DOCUMENTS

APPLICABLE DOCUMENTS

[AD.1]

Digital Electronic Section (DES) Requirement Specification, SPE/SHR/0027/ALS

[AD.2]

On-Board Digital Signal Processing, RQS/SHR/0014/ALS

REFERENCE DOCUMENTS

[RD.1]

Software Requirements, TL19763


OPERATION TABLES

Two main operational scenarios are envisioned for SHARAD.

In the first scenario, the instrument does not perform any measurement and is able to receive commands from the S/C's C&DH. These commands will include the loading of all necessary values and parameters to perform one active pass within one orbit (SHARAD will mainly operate during night passes). Between these parameters is found the Operational Sequence Table, which, for each entry, specifies the diverse measurement to be performed during the active pass.

In relation to the time of overfly of a predefined location, the OST is enabled and the second scenario applies. In this scenario the OST is scanned, starting from a pre-defined time corresponding to a given overflight latitude, and data within each row are used to perform a given measurement mode of given duration and characteristics. During the OST processing, SHARAD will produce Science Data toward the S/C's SSR. At the end of the OST programming, SHARAD reverts to the first scenario and it is ready to accept programming for another pass.

OPERATIONAL SEQUENCE TABLE

SRQD.-3.1/010 Operational Sequence Table

[AD.1] SHR-DES-3.3.2-0300

The Operational Sequence Table, OST, shall contain SHARAD measurement modes programming for the active portion of an orbit. The execution of the OST coincides with performing radar operations.

Measurements shall be initiated by an ENABLE_OST Command and, thence, will proceed autonomously by means of automatic mode transitions following the timeline listed in the Operational Sequence Table.

Each line of the OST defines a single Operational Mode and the required parameters to permit its implementation.

EOR


SRQD.-3.1/020 Operational Sequence Default values

[AD.1] SHR-DES-3.3.2-0320

The current baseline foresees that no default values shall be stored for the OST. After SHARAD switch on the OST shall therefore result empty.

EOR

Fig. 3.1-1 - Basic Operational Sequence Table Representation

SRQD.-3.1/030 Operational Sequence Table Entries Format

[AD.1] SHR-DES-3.4.4-0020

Each Operational Sequence Table entry (line) shall adhere to the format in Tab. 3.1-1 based on a line size of 128 bits. Spare bits shall always be set to 0's. The same applies to bits whenever their usage is not applicable.

Each entry's field is described in the Tab. 3.1-1 (range values not shown shall be intended as Reserved, Don't Use).

EOR

Tab. 3.1-1 - Basic Operational Sequence Table Format

FIELD ID

DEFINITION

SIZE
bits

RANGE

DESCRIPTION

PRI

Pulse Repetition Interval

4

0001 => 1428 ms

0010 => 1492 ms

0011 => 1290 ms

0100 => 2856 ms

0101 => 2984 ms

0110 => 2580 ms

PRI = 1 / PRF to be used for the entire duration of the selected Mode. Applies also to Test Mode depending on different sub-cases.

PH

Phase Compensa-tion

4

0000 = No compensation

0001 = Radial velocity comp.

0010 = Surface Slope comp.

0011 = Radial velocity & Surface slope compensation

To select the DCG initial phase correction, according to the estimated surface slope and the satellite radial velocity.

Spare

2

LENGTH

Data Take Length

22

Value shall be an integer (> 0) multiple of the Pre-summing value

Mode Duration in terms of number of PRI's. This value, multiplied by the PRI value, establishes the duration on the selected Mode.

MODE

Operational Mode

8

000 00000 = Wait Mode

001 00001 = SS Mode sub #1

…

001 10101 = SS Mode sub #21

010 00001 = Cal Mode sub #1

…

010 10101 = Cal Mode sub #21

011 00001 = Rcv Mode sub #1

…

011 10101 = Rcv Mode sub #21

1XX XXXXX = Test Modes

To select the operational Mode/Sub-Mode combination.

(See relevant sub-modes tables 3.1-2, 3.1-3, 3.1-4 for details)

MGC

Manual Gain Control

8

0x00 - 0xFF

Manual Gain Control, used to select the RX attenuation

CS

Compression Selection

1

0 = Static Compression

1 = Dynamic Compression

Bit Compression Algorithm selection

TR

Closed-loop Tracking

1

0 = disabled

1 = enabled

To enable or disable the Closed-loop Tracking

TS

Tracking Data Storage

1

0 = disabled

1 = enabled

To enable or disable the Closed-loop Tracking data packets acquisition

T_PRE

Tracking
Pre-Summing

3

000 = 1

001 = 2

010 = 3

011 = 4

100 = 8

101 = 16

110 = 32

111 = 64

Number of pre-summed blocks to be summed before Tracking task.

TR_LOG

Tracking Logic Selection

1

0 = Logic based in threshold overshooting

1 = Logic based on COG

Selection of the logic for the range tracker discriminator

TH_LOG

Threshold Logic Selection

1

0 = Threshold evaluated on board

1 = Threshold programmed from ground

Selection of the logic for the threshold determination

N_SMPL

Samples Number

4

0000 = 1

0001 = 2

…

1111 = 16

Number of the samples that shall overshoot the threshold.

Spare

1

A_B

Alpha and Beta

2

00, 01, 10, 11

Selection of one out of four coefficient sets for Alfa/Beta filter

REF_BIT

Reference Bit

1

0 = Start with value from the previous mode

1 = Start from a new value

Bit to select the refresh logic of the tracking

THRE

Threshold

8

0x00 … 0xFF

First order linear coefficient for the threshold value

INC_THR

Threshold Increment

8

0x00 … 0xFF

First order linear coefficient for the Increment for the threshold value.

Spare

4

EC_INIT

Initial Echo Value

3

000 … 111

First order linear coefficient for the correction for the initial prediction of the first echo.

D_ECHO

Expected Echo Shift

3

000 … 111

First order linear coefficient for the value to shift the echo position

D_LEFT

Window Left Shift

3

000 … 111

First order linear coefficient for the value to shift the left side of the tracking window

D_RIGHT

Window Right Shift

3

000 … 111

First order linear coefficient for the value to shift the right side of the tracking window

TOPO_V

Topography polynomial coefficients validity

16

0x00000 = all operative modes

0x00001 =

… …

0x40000 =

Validity of the polynomial coefficient necessary to the WPF.

0x00000 allows using the same coefficients for the entire Mode: it may be especially used when WPF is not utilized to determine S/C to surface distance.

SLOPE_V

Slope polynomial coefficients validity

16

0x00000 = all operative modes

0x00001 =

… …

0x40000 =

Validity of the polynomial coefficient necessary to the WPF.

0x00000 allows using the same coefficients for the entire Mode: it may be especially used when WPF is not utilized to determine S/C to surface distance.


Tab. 3.1-2 - Subsurface Sounding sub-modes

SUBSURFACE SOUNDING

MODE code

Sub-mode

Pre-sum

Resolution

001 00001

SS#1

32

8

001 00010

SS#2

28

6

001 00011

SS#3

16

4

001 00100

SS#4

8

8

001 00101

SS#5

4

6

001 00110

SS#6

2

4

001 00111

SS#7

1

8

001 01000

SS#8

32

6

001 01001

SS#9

28

4

001 01010

SS#10

16

8

001 01011

SS#11

8

6

001 01100

SS#12

4

4

001 01101

SS#13

2

8

001 01110

SS#14

1

6

001 01111

SS#15

32

4

001 10000

SS#16

28

8

001 10001

SS#17

16

6

001 10010

SS#18

8

4

001 10011

SS#19

4

8

001 10100

SS#20

2

6

001 10101

SS#21

1

4

Tab. 3.1-3 - Receive Only sub-modes

RECEIVE ONLY

MODE code

Sub-mode

Pre-sum

Resolution

011 00001

RO#1

32

8

011 00010

RO#2

28

6

011 00011

RO#3

16

4

011 00100

RO#4

8

8

011 00101

RO#5

4

6

011 00110

RO#6

2

4

011 00111

RO#7

1

8

011 01000

RO#8

32

6

011 01001

RO#9

28

4

011 01010

RO#10

16

8

011 01011

RO#11

8

6

011 01100

RO#12

4

4

011 01101

RO#13

2

8

011 01110

RO#14

1

6

011 01111

RO#15

32

4

011 10000

RO#16

28

8

011 10001

RO#17

16

6

011 10010

RO#18

8

4

011 10011

RO#19

4

8

011 10100

RO#20

2

6

011 10101

RO#21

1

4

Tab. 3.1-4 - Calibration sub-modes

CALIBRATION

MODE code

Sub-mode

Pre-sum

Resolution

010 00001

CAL#1

32

8

010 00010

CAL#2

28

6

010 00011

CAL#3

16

4

010 00100

CAL#4

8

8

010 00101

CAL#5

4

6

010 00110

CAL#6

2

4

010 00111

CAL#7

1

8

010 01000

CAL#8

32

6

010 01001

CAL#9

28

4

010 01010

CAL#10

16

8

010 01011

CAL#11

8

6

010 01100

CAL#12

4

4

010 01101

CAL#13

2

8

010 01110

CAL#14

1

6

010 01111

CAL#15

32

4

010 10000

CAL#16

28

8

010 10001

CAL#17

16

6

010 10010

CAL#18

8

4

010 10011

CAL#19

4

8

010 10100

CAL#20

2

6

010 10101

CAL#21

1

4


PARAMETERS TABLE

SRQD.- 3.2/010 Parameters Table

[AD.1] SHR-DES-3.3.2-0400

The Parameters Table shall contain all SHARAD's operational parameters organised for a random access. Each parameter is identified by an identification number and it is associated one, or more, values. Value types shall be chosen in a predefined category.

EOR

SRQD.- 3.2/020 Parameters Table Categories

[AD.1] SHR-DES-3.3.2-0410

The Parameters Table shall be used to store the following parameter categories:

. Topography polynomial coefficients

. Surface Slope polynomial coefficients

. Starting Latitude for each of the above coefficients.

. OST starting Time Tag value.

. Additional parameters related to measurements.

. Additional parameters related to instrument operations (configuration values).

EOR

SRQD.- 3.2/030 Parameters Table Value Types

[AD.1] SHR-DES-3.3.2-0420

The Parameter Table values shall belong to one of the following types:

8 bit integer (8INT)

16 bit integer (16INT)

32 bit integer (32INT)

32 bit float (32FLT)

32 bit x N float array (32ARR)

48 bit time tag (TTIME)

EOR

Fig. 3.2-1 - Basic Parameters Table Representation

SRQD.- 3.2/040 Parameters Table Default Values

[AD.1] SHR-DES-3.3.2-0440

After SHARAD switch on, Parameter Table values shall be assigned the default values according to their definition

EOR


SRQD.- 3.2/050 Parameters Table Content

[AD.1] SHR-DES-3.4.4-0030

The Parameter Table shall provide an index based storage space for the parameters listed in Tab. 3.2.1. Each parameter identified so far is described within the table itself or it is discussed elsewhere in this document.

For parameters listed in Tab. 3.2.1, range values not shown shall be intended as Reserved, Don't Use. Values are right aligned (values start from the LSB of each location).

EOR

Tab. 3.2-1 - Basic Parameters Table Representation

Id

Rel address

Parameter name

Default

Range

Type

Description

0

000

PT_OSTSTARTSEC

0

0 : FFFFFFFF

U32

OST starting time tag (seconds)

1

001

PT_OSTSTARTFRCT

0

0 : FFFF

U16

OST starting time tag (fractions)

2

002

PT_ODTSTARTSEC

0

0 : FFFFFFFF

U32

ODT beginning time tag.

3

003

PT_ODTSTARTFRCT

0

0 : FFFF

U16

ODT beginning time tag.

4

004

PT_ODTSTEP

1

0 : FF

U8

Time interval in seconds between subsequent ODT values.

5

005

PT_ALIVE_PERIOD

5

0 : FF

U8

SHARAD ALIVE discrete TC period

6

006

PT_MONSAMPLE

1

0 : FF

U8

Time interval in seconds for monitoring the engineering parameters (the modify shall be used after restart).

7

007

PT_ENGTLM

5

0 : FF

U8

Time interval in seconds for generating ENG_TLM frames toward the SSR.

8

008

PT_SPARE

9

009

PT_HKTLM

0x8F

NA

BF

Enabled HK TM

Bit 0: TLM_ENG (1=Enabled, 0=Disabled)

Bit 1: TLM_CMD (1=Enabled, 0=Disabled)

Bit 2: TLM_LOG (1=Enabled, 0=Disabled)

Bit 3: TLM_DMP (1=Enabled, 0=Disabled)

Bit 4: CMD_LOG (1=Enabled, 0=Disabled)

Bit 4 to 6: Unused, set to 0.

Bit 7: TLM_BUFFER (1=Enabled, 0=Disabled)

10

00A

PT_MAXOST

100

0 : FF

U8

Maximum number of OST lines

11

00B

PT_MAX_TIMEJUMP

60

0 : FFFFFFFF

U32

Maximum time jump for Time Update CMD

12

00C

PT_CH1LLIM

0x08

0 : FF

U8

Lower monitoring limit for ch. 1

13

00D

PT_CH1ULIM

0x7F

0 : FF

U8

Upper monitoring limit for ch. 1

14

00E

PT_CH2LLIM

0x70

0 : FF

U8

Lower monitoring limit for ch. 2

15

00F

PT_CH2ULIM

0x8F

0 : FF

U8

Upper monitoring limit for ch. 2

16

010

PT_CH3LLIM

0x8F

0 : FF

U8

Lower monitoring limit for ch. 3

17

011

PT_CH3ULIM

0xAA

0 : FF

U8

Upper monitoring limit for ch. 3

18

012

PT_CH4LLIM

0x75

0 : FF

U8

Lower monitoring limit for ch. 4

19

013

PT_CH4ULIM

0xAC

0 : FF

U8

Upper monitoring limit for ch. 4

20

014

PT_CH5LLIM

0x19

0 : FF

U8

Lower monitoring limit for ch. 5

21

015

PT_CH5ULIM

0xFF

0 : FF

U8

Upper monitoring limit for ch. 5

22

016

PT_CH6LLIM

0x0F

0 : FF

U8

Lower monitoring limit for ch. 6

23

017

PT_CH6ULIM

0xF6

0 : FF

U8

Upper monitoring limit for ch. 6

24

018

PT_CH7LLIM

0x00

0 : FF

U8

Lower monitoring limit for ch. 7

25

019

PT_CH7ULIM

0xFF

0 : FF

U8

Upper monitoring limit for ch. 7

26

01A

PT_CH8LLIM

0x00

0 : FF

U8

Lower monitoring limit for ch. 8

27

01B

PT_CH8ULIM

0xE5

0 : FF

U8

Upper monitoring limit for ch. 8

28

01C

PT_WU1ACTDEL

20

0 : 0x418937

U32

Warm Up 1 activation delay [s]

29

01D

PT_WU1DEACTDEL

5

0 : 0x418937

U32

Warm Up 1 de-activation delay [s]

30

01E

PT_WU2ACTDEL

40

0 : 0x418937

U32

Warm Up 2 activation delay [s]

31

01F

PT_WU2DEACTDEL

10

0 : 0x418937

U32

Warm Up 2 de-activation delay [s]

32

020

PT_SPARE

33

021

PT_F_CONV

26666667

1 : 0xFFFFFFFF

U32

Conversion Factor [Hz]

34

022

PT_PRF_1

1/1428e-6

F

Nominal_1 PRF [Hz]

35

023

PT_PRF_2

1/1492e-6

F

Nominal_2 PRF [Hz]

36

024

PT_PRF_3

1/1290e-6

F

Nominal_3 PRF [Hz]

37

025

PT_SPARE

38

026

PT_PRF_HALF_1

1/2856e-6

F

Nominal_Half_1 PRF [Hz]

39

027

PT_PRF_HALF_2

1/2984e-6

F

Nominal_Half_2 PRF [Hz]

40

028

PT_PRF_HALF_3

1/2580e-6

F

Nominal_Half_3 PRF [Hz]

41

029

PT_SPARE

42

02A

PT_WPF_VALUE

64

F

NWpf

43

02B

PT_T0

1e-5

F

Correction [s]

44

02C

PT_C

299792.458

F

Light Speed [km/s]

45

02D

PT_LAMBDA_20M

14.99

F

Wave length [m]

46

02E

PT_SPARE

47

02F

PT_RX_MIN_N1

105e-6

F

RX window Lower Limit for Nominal_1 PRF [s]

48

030

PT_RX_MAX_N1

1243e-6

F

RX window Upper Limit for Nominal_1 PRF [s]

49

031

PT_RX_MIN_N2

105e-6

F

RX window Lower Limit for Nominal_2 PRF [s]

50

032

PT_RX_MAX_N2

1307e-6

F

RX window Upper Limit for Nominal_2 PRF [s]

51

033

PT_RX_MIN_N3

105e-6

F

RX window Lower Limit for Nominal_3 PRF [s]

52

034

PT_RX_MAX_N3

1105e-6

F

RX window Upper Limit for Nominal_3 PRF [s]

53

035

PT_RX_MIN_N4

1523e-6

F

RX window Lower Limit for Nominal_Half_1 PRF [s]

54

036

PT_RX_MAX_N4

2671e-6

F

RX window Upper Limit for Nominal_ Half_1 PRF [s]

55

037

PT_RX_MIN_N5

1587e-6

F

RX window Lower Limit for Nominal_ Half_2 PRF [s]

56

038

PT_RX_MAX_N5

2799e-6

F

RX window Upper Limit for Nominal_ Half_2 PRF [s]

57

039

PT_RX_MIN_N6

1385e-6

F

RX window Lower Limit for Nominal_ Half_3 PRF [s]

58

03A

PT_RX_MAX_N6

2395e-6

F

RX window Upper Limit for Nominal_ Half_3 PRF [s]

59

03B

PT_SPARE

60

03C

PT_START_TLP

F

First data set used for data processing (first of 60 copies)

61

03D

PT_S0

F

62

03E

PT_S1

F

63

03F

PT_S2

F

64

040

PT_S3

F

65

041

PT_S4

F

66

042

PT_S5

F

67

043

PT_S6

F

68

044

PT_S7

F

69

045

PT_TOP0

F

70

046

PT_TOP1

F

71

047

PT_TOP2

F

72

048

PT_TOP3

F

73

049

PT_TOP4

F

74

04A

PT_TOP5

F

75

04B

PT_TOP6

F

76

04C

From second to 60th data set used for data processing

…

F

1019

3FB

1020

3FC

PT_SPARE

1021

3FD

PT_WAVEFORM_MODE_DCG

0x00000000

U32

DCG Configuration parameters

1022

3FE

PT_INITIAL_WAVEFORM_DCG

0x00800000

U32

1023

3FF

PT_WAVEFORM_NUMBER_DCG

0x00400000

U32

1024

400

PT_WAVEFORM_CONTROL_DCG

0x00C2C000

U32

1025

401

PT_DITHERING_CONTROL_DCG

0x00D20000

U32

1026

402

PT_START_FREQ_MSW_DCG

0x00D8000A

U32

1027

403

PT_START_FREQ_LSW_DCG

0x00C80000

U32

1028

404

PT_SLOPE_MSW_DCG

0x00D07FFF

U32

1029

405

PT_SLOPE_LSW_DCG

0x00C019D3

U32

1030

406

PT_DURATION_MSW_DCG

0x00DC0000

U32

1031

407

PT_DURATION_LSW_DCG

0x00CC2560

U32

1032

408

PT_PHASE_MSW_DCG

0x00D40000

U32

1033

409

PT_PHASE_LSW_DCG

0x00C40000

U32

1034

40A

PT_TRK_NTRK_1

0x41A

U32

Closed Loop Tracking step for Nominal_1 PRF ##SHR-PROC-3.1.9-0010

1035

40B

PT_TRK_NTRK_2

0x3ED

U32

Closed Loop Tracking step for Nominal_2 PRF

1036

40C

PT_TRK_NTRK_3

0x48A

U32

Closed Loop Tracking step for Nominal_3 PRF

1037

40D

PT_TRK_NTRK_4

0x20D

U32

Closed Loop Tracking step for Nominal_Half_1 PRF

1038

40E

PT_TRK_NTRK_5

0X1F6

U32

Closed Loop Tracking step for Nominal_Half_2 PRF

1039

40F

PT_TRK_NTRK_6

0x245

U32

Closed Loop Tracking step for Nominal_Half_3 PRF

1040

410

PT_TRK_C_LOL_INI

-6

I32

Initial value for C_lol parameter ##SHR-PROC-3.1.9-0020

1041

411

PT_TRK_S_M

1024

0 : 2047

U16

Initial Offset position ##SHR-PROC-3.1.9-0020

1042

412

PT_TRK_EC_INI_0

0

-2047 : 2046

I16

Initialization Value for echo correction 0

1043

413

PT_TRK_EC_INI_1

-4

-2047 :

2046

I16

Initialization Value for echo correction 1

1044

414

PT_TRK_FS

(80E6)/3

F

Sampling Frequency. Type float [Hz]

1045

415

PT_TRK_LWIND_INI

530

U32

1046

416

PT_TRK_RWIND_INI

530

U32

1047

417

PT_SPARE

1048

418

PT_TRK_MIN_WIND

0

0 : 2047

U16

1049

419

PT_TRK_MAX_WIND

2047

0 : 2047

U16

1050

41A

PT_ALPHA00

0.56

F

Alpha filter coefficient, set 00

1051

41B

PT_BETA00

0.09

F

Beta filter coefficient, set 00

1052

41C

PT_ALPHA01

1

F

Alpha filter coefficient, set 01

1053

41D

PT_BETA01

0

F

Beta filter coefficient, set 01

1054

41E

PT_ALPHA10

0.4

F

Alpha filter coefficient, set 10

1055

41F

PT_BETA10

0.2

F

Beta filter coefficient, set 10

1056

420

PT_ALPHA11

0.3

F

Alpha filter coefficient, set 11

1057

421

PT_BETA11

0.3

F

Beta filter coefficient, set 11

1058

422

PT_TRK_INC_THR_0

0

F

#SHR-PROC-3.1.9.1-0020

1059

423

PT_TRK_INC_THR_1

10

F

1060

424

PT_TRK_TH_0

0

F

1061

425

PT_TRK_TH_1

0

F

1062

426

PT_TRK_CO_W_TH

0

I32

1063

427

PT_TRK_AD_W_TH

1300

I32

1064

428

PT_TRK_DI_W_TH

250

I32

1065

429

PT_SPARE

1066

42A

PT_SPARE

1067

42B

PT_SPARE

1068

42C

PT_SPARE

1069

42D

PT_SPARE

1070

42E

PT_TRK_MAX_W_TH

1800

I32

#SHR-PROC-3.1.9.2-0010

1071

42F

PT_TRK_MIN_W_TH

650

I32

1072

430

PT_TRK_DEL_EC_0

0

I32

#SHR-PROC-3.1.9.3-0020

1073

431

PT_TRK_DEL_EC_1

20

I32

1074

432

PT_TRK_DEL_L_0

0

I32

1075

433

PT_TRK_DEL_L_1

75

I32

1076

434

PT_TRK_LEFT_MIN

130

I32

1077

435

PT_TRK_DEL_R_0

0

I32

1078

436

PT_TRK_DEL_R_1

75

I32

1079

537

PT_TRK_RIGHT_MIN

130

I32

1080

438

PT_SPARE

1081

439

PT_TRK_LEFT_MAX

600

I32

1082

43A

PT_TRK_RIGHT_MAX

600

I32

1083

43B

PT_TRK_DEL_LOL

2

I32

1084

43C

PT_TRK­_MAX_POS

60

I32

1085

43D

PT_TRK­_MIN_POS

900

I32

1086

43E

PT_SPARE

1087

43F

PT_TRK_DEL_OCOG_MAX

66.6666

F

1088

440

PT_TRK_N_T_DATA

0

##SHR-PROC-3.1.9.3-0040

1089

441

PT_SPARE

1090

442

PT_TRK_REF_A1

1

F

Coefficient A1 for Reference Function generation

1091

443

PT_TRK_REF_A2

-3.6960e11

F

Coefficient A2 for Reference Function generation

1092

444

PT_TRK_REF_A3

7.5e-8

F

Coefficient A3 for Reference Function generation

1093

445

PT_TRK_REF_TAU0

566.66667

F

Coefficient TAU0 for Reference Function generation

1094

446

PT_SPARE

1095

447

PT_TRK_REF_R0

F

Run Time Generated array for reference function, Real part

1096

448

PT_TRK_REF_R1

F

…

F

3143

C47

PT_TRK_REF_R2047

F

3144

C48

PT_TRK_REF_I0

F

Run Time Generated array for reference function, Imaginary part

3145

C49

PT_TRK_REF_I1

F

…

F

5191

1447

PT_TRK_REF_I2047

F

5192

5200

1448

1450

PT_SPARE

Type

Meaning

U8

Unsigned int 8 bit

U16

Unsigned int 16 bit

U32

Unsigned int 32 bit

I32

Signed int 32 bit

I16

Signed int 16 bit

F

Float 32 bit

BF

Bit field


ORBITAL DATA TABLE

SRQD.- 3.3/010 Orbital Data Table

[AD.1] SHR-DES-3.3.2-0500

The Orbital Data Table shall contain orbit-related parameters required for the open-loop tracking of the radar sounding process. Data for the ODT are generated on Ground and provided to the instrument as part of the programming for each active orbital pass.

EOR

Fig. 3.3-1 - Basic Orbital Table Representation

SRQD.- 3.3/020 Orbital Data Table Default Values

[AD.1] SHR-DES-3.3.2-0520

At SHARAD switch on, the Orbital Data table shall entirely set to zero.

EOR


SRQD.- 3.3/030 Orbital Data Table Format

[AD.1] SHR-DES-3.4.4-0510

[AD.2] SHR-PROC-3.1.8-0002

The Orbital Data Table shall contain the following 32 bit floating point values:

  • S/C Track Length Position (TLP) [Latitude (on Mars aeroid)]
  • S/C Radius (distance from Mars' centre)
  • S/C Radius Rate
  • S/C Tangential Velocity

Each value is defined as function of time and from an initial reference time, ODT_START, and with a fixed step, ODT_STEP, measured in seconds.

For a correct interpretation of the data an additional parameter provide the knowledge if the segment of the orbit of interest is defined after an Ascending or a Descending Node, ODT_ANODE. See Fig 3.3-2.

EOR

Note: Track Length Position (TLP) is an equivalent measure of the Spacecraft position along the ground track, in an arbitrary unit named Track Length Unit (TLU). The TLU will be selected conveniently and coherently with the polynomial coefficients. A hypothesis of TLU could be the distance from a reference point (i.e. equatorial or the initial of the orbit track) covered by the spacecraft and projected on a meridian. If TLU coincides with a meridian, an ambiguity problem in latitude, could be present.

PT

ORBITAL DATA TABLE

ODT_START

TLP

RADIUS

RADIUS_RATE

TANG_VEL

48 bit

TLP

RADIUS

RADIUS_RATE

TANG_VEL

TLP

RADIUS

RADIUS_RATE

TANG_VEL

ODT_STEP

TLP

RADIUS

RADIUS_RATE

TANG_VEL

8 bit

TLP

RADIUS

RADIUS_RATE

TANG_VEL

TLP

RADIUS

RADIUS_RATE

TANG_VEL

ODT_ANODE

…

…

…

…

8 bit

32 bit

32 bit

32 bit

32 bit

Fig. 3.3-1 - Orbital Table Format


EEPROM LAYOUT

The following tables describe the layout of the EEPROM and of the DATA RAM:

Partition

Address

Description

EEPROM A

0x00000000

Interrupt Table

0x00000100

Boot / Loader Code

0x00001FFF

Boot checksum

0x00002000

Program Code

0x0000DFFF

Program checksum

0x0000E000

Parameter Table

0x0000F000

Copy of Boot / Loader code (1^ part)

EEPROM B

0x00010000

Interrupt Table

0x00010100

Boot / Loader Code

0x00011FFF

Boot checksum

0x00012000

Program Code

0x0001DFFF

Program checksum

0x0001E000

Parameter Table

0x0001F000

Copy of Boot / Loader code (2^ part)

Data RAM

0x00000000

0x00026000

Parameter Table

0x00027450

OST

0x0002784C

ODT

0x0002C84C