Thoth Technology Argus 2000 Manuale utente

Argus 2000 IR Spectrometer

Owner’s Manual

Document Number

OG274001

Issue

Release 1.03

without the written consent of Thoth Technology. The information contained in this document is restricted

and may be subject to international laws governing spacecraft products and services.

Thoth Technology Inc., Algonquin Radio Observatory, Achray Road, RR6

Pembroke, Ontario K8A 6W7, Canada

Tel: +(1) (905) 713-2884. Email: [email protected], www.thothx.com

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Table of Contents

1PRODUCT KEY .................................................................................................... 5

2PURPOSE ............................................................................................................ 6

3SCOPE ................................................................................................................. 6

4SYMBOLS USED ................................................................................................. 6

5TRADEMARKS .................................................................................................... 6

6IMPORTANT SAFETY INSTRUCTIONS .............................................................. 7

7PACKAGE CONTENTS ....................................................................................... 7

8PRODUCT FEATURES ........................................................................................ 8

8.1Specifications ...........................................................................................................9

8.2Detector System ..................................................................................................... 10

8.3Optical Design ....................................................................................................... 13

8.4Optical Efficiency .................................................................................................. 13

8.5Angular Sensitivity ................................................................................................. 14

8.6Response to Collimated Monochromatic Laser Source ........................................ 15

8.7Functional Design.................................................................................................. 15

8.8Applications ........................................................................................................... 17

8.8.1Observing atmospheric gas and mineral species.................................................................17

9GROUND SYSTEM ELECTRONICS SETUP ..................................................... 22

10ARGUS GSE TEST APPLICATION ................................................................... 22

10.1Argus Status Message ............................................................................................23

10.2Adjusting Spectrum Pixel Range...........................................................................23

10.3Commanding the Instrument Settings ..................................................................23

10.4Data Logging .........................................................................................................24

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10.5Communications....................................................................................................24

11INTEGRATION ................................................................................................... 24

11.1Power Interface ......................................................................................................24

11.2Communications Interface ....................................................................................24

11.3Timing of Spectra Acquisition and Co-Adding Feature .......................................25

11.4Data Packet Format ...............................................................................................25

11.5Connectors .............................................................................................................28

11.6Mechanical Interfaces............................................................................................30

11.7Environment ..........................................................................................................32

12OPERATION ....................................................................................................... 33

12.1Command Format (Models 01-03).........................................................................33

12.1.2Command List .........................................................................................................................35

12.2Command Format (Model 04) ...............................................................................37

12.2.2Command List Model 04........................................................................................................40

13TROUBLESHOOTING ........................................................................................ 43

14WARRANTY ....................................................................................................... 43

14.1Disclaimer ..............................................................................................................44

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Release Notes

Issue Revisions Date

1.01

1.02

1.03

Draft for release.

Revised, corrected and enlarged

Revised

1 December 2017

16 March 2018

15 August 2018

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1 Product Key

The product code format for the Argus instruments described in this manual is:

ARGUS2000XYZ-NN.

The code descriptions are as follows:

Table 1: X Letter Code Key

Letter Code Description

A Aluminum optics

G Gold optics

S Space certified

N UAV grade

Table 2: Y Letter Code Key

Letter Code Description

U Unit only (kit excluded)

K Kit included

Table 3: Z Letter Code Key

Letter Code Description

L Standard range

E Extended range

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Table 4: NN Number Code Key

Number Code Description

01 700 nm – 1150 nm range

02 1000 nm –1650 nm range

03 1240 nm – 2000 nm extended range

04 1730 nm – 2200 nm extended range

2 Purpose

The purpose of this guide is to provide explanations and procedures for installing, operating,

maintaining and troubleshooting the Argus 2000 IR Spectrometer.

3 Scope

This document provides safety guidelines, setup information, operating instructions,

troubleshooting procedures and interface and technical specifications for the Argus 2000 IR

Spectrometer.

4 Symbols Used

The following symbols are used in this document.

CAUTION

Cautions identify conditions or practices that could result in damage to the

instrument or other equipment.

5 Trademarks

Argus is a registered trademark of Thoth Technology Inc.

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6 Important Safety Instructions

CAUTION

This guide contains important safety instructions that should be followed during

handling, installation and operation of this product. Be sure to read and understand

these safety instructions prior to handling.

 Before installing or using this product, read all instructions and cautionary markings located

in this guide.

 The instrument should be handled with gloves in a suitable clean room environment. Care

should be taken not to contact optical surfaces or instrument corners.

 Do not attempt to open or unseal the unit. This product contains no serviceable parts.

 The instrument shall be accommodated in a temperature and humidity controlled clean room

of cleanliness class no worse than 100,000 during handling, assembly, integration and test.

 Anti-static grounding procedures must be observed when handling the instrument or

interface electronics. Care should be taken to align connector keys prior to insertion of

instrument interface.

 Do not shock the instrument physically or expose this unit to liquids of any type.

7 Package Contents

The Argus instrument and GSE Kit includes the items shown in Figure 1 and itemized in

Table 5.

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Figure 1: Argus Instrument and GSE Kit.

Table 5: Argus GSE Kit Contents

Item Location (Figure 1) Description

1 Center Argus unit

2 Top left Shipping case

3 Top right Argus ground test display laptop

4 Bottom Left Argus power and communications interface

cable, example electrical and mechanical

mounting hardware.

5 Bottom Center Laptop serial interface USB adapter

6 Bottom Center Right Argus power USB adapter (5V)

7 Bottom Center Left Laptop power module

8 Bottom Right Laptop mains power cable (NEMA 5-15)

8 Product Features

The Argus spectrometer operates in the near infrared band in the standard range or in extended

range versions. For instrument spectral variations please see the product key. Argus features a

surface resolution of approximately 1.6 km when deployed in Low Earth Orbit (LEO). The

device uses a detector array of 1x256 elements that is actively cooled. Each pixel has a native

radiometric resolution of 10-bits. For models with numbers 01-03 resolution may be enhanced to

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13-bit performance by utilizing the integrations setting to co-add successive spectra. The device

includes a microcontroller, which controls the instrument’s components. The device operates

typically in a continuous single-pixel scanning mode with approximately 100 illuminated spectral

channels.

8.1 Specifications

The technical specifications for Argus 2000 are summarized in Table 6, below.

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Table 6: Technical Specifications, Argus 2000 Spectrometer

Argus 2000 Specification

1. Type Grating spectrometer

2. Configuration Single aperture spectrometer

3. Field of View 0.15º viewing angle around centered camera boresight with 15mm

fore-optics

4. Mass ~280 g

5. Accommodation 46 mm x 80 mm x 80 mm

6. Operating Temp. -20ºC to +40ºC operating temperature

7. Survival Temp. -25ºC to + 50ºC survival temperature

8. Detector InGaAs diode arrays with Peltier cooler

9. Grating 300 g/mm

10. Electronics microprocessor controlled 10-bit ADC (co-adding feature to enhance

precision to 13-bit, models 01-03), 3.6-4.2V input rail 250mA-1500mA

(375mA typical)

11. Operational Modes –Continuous cycle, constant integration time with co-adding feature

–Adaptive Exposure mode

12. Data Delivery Fixed length parity striped packets of single or co-added spectra with

sequence number, temperature, array temperature and operating

parameters

13. Interface Serial interface RS232 protocol

14. Spectral Channels 100 (typical)

15. Integration Time 500 μs to 4.096 sec

16. Handling Shipped by courier in ruggedized carrying case

8.2 Detector System

A linear gallium arsenide (InGaAs) photodiode array with high-quantum efficiency pixels in the

infrared detect radiation emitted for a 1.5 km2surface tile, assuming LEO orbit altitude of 600

km, that has been divided spectrally by the grating optics. The array is a hybrid InGaAs and

CMOS acitve-pixel readout electronics in which the photo-current is buffered, amplified and

stored. Channels are differentially sampled as a form of double correlated sampling. Two values

of feedback capacitor may be selected (the HIGH setting enhances dynamic range, the LOW

setting increases sensitivity). Typical device quantum efficiencies are shown in the figures below.

Indice

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