QB50 System Requirements Document

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TITLE: QB50 m-NLP Science Unit Interface Control DocumentDoc. No. MSSL-QB50-ID-12001-DRAFT a1 IntroductionThis document controls the required interfaces between a QB50 CubeSat and the m-NLP Science Unit.Science Unit: As described in the call for proposals, the menu of sensors selected forthe science units are:Ion Mass Spectrometer (IMS)Neutral Mass Spectrometer (NMS)Flux-Φ-Probe Experiment (FIPEX)Multi-Needle Langmuir Probe (m-NLP)Corner Cube Laser Retro-reflectors (CCR)Thermistors/thermocouples/RTD (TH)A Science Unit will comprise one of the following options:1) IMS + NMS, plus Thermistors and CCR2) FIPEX, plus Thermistors and CCR3) m-NLP, plus Thermistors and CCRThe design objective for the Science Unit is to remain within a 600 mW power budget(duty-cycled, orbit averaged), 600 g mass budget and half a CubeSat unit volumebudget (excluding forward protuberance). 20% design margin is being held within thesebudgets. As the final configuration of the Science Unit to be provided to each of theCubeSat teams will only be made known after selection, representative mechanical andelectrical interfaces with an overall resource envelope of the design objective areprovided here.The location of the Science Unit Thermistors (TH) within the body of the CubeSat willbe included in a later version of this document.If a CubeSat team selects to implement the Corner Cubes (CCR), it shall be theirresponsibility to select the location and interface of the Corner Cubes (CCR). Provisionfor mounting a Sun Sensor on the external body of the SU, and a CubeSat SystemThermistor within the Science Unit is TBC. Details shall be included in a later version ofthis document.Page 5 of 27
TITLE: QB50 m-NLP Science Unit Interface Control DocumentDoc. No. MSSL-QB50-ID-12001-DRAFT a2 Normative and Informative documents2.1 Normative DocumentsND1: UM-3: CubeSat Kit User manual Rev D2 issued 17 Sep 2003.ND2: I2C Bus Specification Ver 2.1 Jan 2000ND3: CubeSat Design Specifications Rev. 12ND6: m-NLP Science Unit Science Requirements Document – Issue X (TBI)ND7: m-NLP Science Unit Detailed Design Document – Issue X (TBI)2.2 Informative DocumentsID1: Call for CubeSat Proposals for QB50 issued 15 Feb 2012ID2: QB50 SSWG Final Report to be issued 1 Mar 2012ID3: National Semiconductor DAC121S101/DAC121S101Q Data sheetID4: National Semiconductor ADC128S052 Data sheetPage 6 of 27
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QB50System Requirementsand Recommen
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Science Payload Interface Control D
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1. CubeSat System Requirements1.1 S
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Figure 3: 3U CubeSat extended volum
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possibility of using other team’s
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QB50-SYS-1.5.11. Every science pack
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3. Display which ground station is
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2.3 Spacecraft ContaminationQB50-SY
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4.1 MechanicalAs shown in Figure 5,
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Attachment A: INMS Interface Contro
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CHANGE RECORDIssue Date Sections ch
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5.9.4 OBC_SU_ON (0xFB) ............
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2 Normative and Informative documen
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CUBESAT side connector to attach to
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4.1.1 SWITCHED Power PinsThe +5, +3
Page 37 and 38: 4.4 Power BudgetThe power budget is
Page 39 and 40: 5.3 Command & Response Handling5.3.
Page 41 and 42: 5.4 Command Packet Structure to Sci
Page 43 and 44: 5.7 SU State Transition DiagramThe
Page 45 and 46: 5.9.2 Script TIME Field - @tTime-ta
Page 47 and 48: 5.9.9 SU_STIM (0x04)This command wi
Page 49 and 50: 5.9.12 SU_CALM (0x07)This command r
Page 51 and 52: 5.9.14 SU_HK (0x09)The HOUSE_KEEPIN
Page 53 and 54: 5.10 Example SU Command Sequence Sc
Page 55 and 56: 7 Attitude ControlThe CubeSat shall
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Page 59 and 60: FIPEX on QB50 Date: 06.02.2013--- D
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Page 85 and 86: TITLE: QB50 m-NLP Science Unit Inte
Page 87: TITLE: QB50 m-NLP Science Unit Inte
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QB50 System Requirements Document

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