Appendix B

Epsilon User’s Manual

Appendix B
Lightband® Interface

This document describes Lightband® interface.

B-1

Appendix B

Epsilon User’s Manual

B1. Mount Position
The coordinate systems of LV and Micro satellites are shown in Figure B1-1.

STA
6020.5

180°＋ZB

Origin of the Micro Satellite(Center of the Mounting Surface ofLightband® UpperRing(138.36mm)＋Xsc

Separation
Direction

SC１(504.9mm)

＋Ysc

（4°)

90°
＋YB

SC3＋XB(173.24mm)
lop

270°

(494.02mm)＋Zsc

Fairin

PLF-R

PLF-L

gEnve

SC2Fairing
Separation Plane0°Launcher BoomSection A-A[TOP VIEW](The coordinates of other 2 satellites, SC2 and SC3, are arranged 120 [deg] apart.)
Figure B1-1 Coordinate Systems of LV (B) and Micro Satellite (SC1)

B-2

Appendix B

Epsilon User’s Manual

B2. PL Usable Volume
PL usable volume is defined in Section 4.1.1.
The usable volume for a Micro satellite is shown in Figure B2-1.

800

Zsc

52

Xsc
Mounting Surface ofLightband® Upper Ring

600

BXsc

Φ151200

Ysc

14.7600
View B
Figure B2-1 Usable Volume for Micro Satellite

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Appendix B

Epsilon User’s Manual

B3. Mechanical Interface(1) Details of Lightband®
The connection/separation system for Micro satellites is Lightband® (8 inch MLB8.000-12)
manufactured by Planetary Systems Corporation.
The interface dimensions of the Lightband® are shown in Figure B3-1.
The interface on Micro satellite rear frame surface with the Lightband® upper ring is shown in Figure
B3-2.
Notes:For any related information not provided in this document, refer to 2000785F MkII MLB User Manual(Lightband® User Manual).
If there is any discrepancy between this document and Lightband® User Manual, this document will
prevail.
If you are uncertain or doubtful about any description in this document, contact your Program
Director.

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Appendix B

Epsilon User’s Manual

Separation+Ysc

Connector
Connecter(φ5.93±0.02inch)
φ150.6±0.51mm(Lower Ring)

J12+Xsc
(0.56±0.02inch)
14.2±0.51mm(Lower Ring)(Lower Ring)

Separation
Switch

(6.0±0.03inch)
152.4±0.76mm(φ7.00±0.02inch)
φ177.8±0.51mm(Upper Ring)(φ10.04±0.02inch)
φ255.0±0.51mm(Upper & Lower Ring)

Bolt
ボルトP.C.D(φ8.0±0.01inch)
φ203.2±0.25mm

Separation
SwitchSeparation(5.39±0.02inch)
136.9±0.51mm

Connector
Connecter

J11(Lower Ring)(0.14±0.01inch)+Zsc
3.56±0.25mm(Upper Ring Mounting Flange)

Satellite

Separation
Connector
ConnecterJ11J11(1.79±0.01inch)
45.5±0.25mm(2.1±0.015inch)
53.3±0.4mm(0.32±0.01inch)
8.1±0.25mm

Mount Panel Cover(0.34±0.01inch)
8.6±0.25mm(0.17±0.01inch)
4.32±0.25mm(Lower Ring Mounting Flange)

RocketSeparation
Connector P11Connecter
P11Flatness 0.3mm※The number and arrangement of separation springs are for reference. Actual ones are defined in ICD ofeach micro satellite.
Figure B3-1 (1/2)

8 inch Lightband® Interface Dimensions (connected)

B-5

Appendix B

Epsilon User’s Manual

Satellite

UPPER RING
(2.16±0.01inch)
54.9±0.25mm

Fasteningbolts to thesatellite
Separation
Connecter
Connector

Separation
Switch(1.11±0.01inch)
28.2±0.25mm(1.03±0.02inch)
26.2±0.51mm(2.74±0.01inch)
69.6±0.25mm

Separation
SpringLOWER RING
Mount Panel CoverRocketFigure B3-1 (2/2)

8 inch Lightband® Interface Dimensions (separated)+Ysc

φ177.3 MAX
φ228.6 min（Part ofRa 3.2）600MAX0.05（30°TYP）

15 °

+Xsc

8inch Lightband®
Envelop()

P.C.D φ203.2
12-1/4" -28UNF Lock Insert 2D size
EQUALLY SPACED
φ0.3
600 MAX[mm][BOTTOM VIEW]
Figure B3-2 Interface on Micro satellite rear frame surface with Lightband® upper ringB-6

Appendix B

Epsilon User’s Manual(2) Interface Demarcation Point
The interface demarcation point is shown in Figure B3-3.

Fastener between
micro Satellite andLightband® upperring

Micro Satellite
Micro Satellite side

InterfaceDemarcationpoint
LV sideLightband®

Mount Panel Cover (LV)
Panel of Multi Satellite Mount Structure(LV)Lightband®
Mount Panel CoverFigure B3-3 Interface Demarcation Point

B-7

Appendix B

Epsilon User’s Manual(3) Rear Frame of Micro Satellite
The rear frame of a Micro satellite is not subject to direct load generated by the tip of each separation
spring because the load is mitigated by the Lightband® upper ring.
(4) Material for Mating Section
The standard materials for the mating section are shown in Table B3-1.
Table B3-1 Materials for Mating Section

Material

PL sideLV sideDefined in ICD

Aluminum Alloy(5) Coating on Mating Section
The standard coatings on the mating section are shown in Table B3-2.
Table B3-2 Coatings on Mating Section
PL sideContact Surface

Defined in ICD

OtherDefined in ICD

Surfaces

B-8

LV sideAnodic oxidation coating
MLI-A-8625, TYPEIII, Class1
Anodic oxidation coating
MLI-A-8625, TYPEIII, Class1
Electroless nickel plating
AMS-B26074, Class4, GradeB
Chemical conversion coating
MIL-C-5541, Class3etc.

Appendix B

Epsilon User’s Manual(6) Mass of parts of the separation system remaining on PL side
The mass of parts of the separation system remaining on Micro satellite side after separation isshown in Table B3-3.
Table B3-3 Typical mass of parts of separation system remaining on Micro satellite side after separation

Mass [kg]Center of Gravity[mm]Nominal

Notes

0.511

-Xsc

-6.01

Ysc
Zsc

-0.03
-9.84

Coordinate System
is shown in Figure B2-1.

Note: Values are for standard configuration of parts. The details of remaining parts of separation
connectors and separation switches are shown in Section B3. (9) and Section B3. (10),respectively.
(7) Mechanical interface between Lightband® upper ring and Micro satellite rear frame
Typical mechanical interface between a Lightband® upper ring and a Micro satellite rear frame isshown in Table B3-4.
Interface dimensions in the mating section of a Lightband® upper ring and a Micro satellite rear frame
are shown in Figure B3-4.
Customer shall verify the strength of the mating section of its Micro satellite rear frame.
The strength of each fastener is shown in Table B3-5. The allowable load of the fastener and reference
value of the maximum axial force at the highest tightening torque as seen in Table B3-4 are shown in
Table B3-5.

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Appendix B

Epsilon User’s Manual

Table B3-4 Typical mechanical interface between Lightband® upper ring and Micro satellite rear frame
Number of Fasteners

12Fastener Part Number

NAS1351N4-12 (L = 19.05 mm)

Washer Part Number

NAS620B416 (t = 1.6 mm)

Running Torque

0.4 to 3.3 N･mCustomer, before shipping, shall confirm that the bolt
holes on its satellite rear frame meet the above runningtorque value.
LSP, before mating, will confirm that the bolt holes meet
the above running torque value, and then apply combinedforces of running torque and tightening torque to tighten
fasteners.

Tightening Torque

8.7 to 10.1 N･m

InsertLength: 2D
Lock type (Lock insert)
Coating: No Coating

Procurement

Fasteners & washers: LV
Inserts: PL（3.43）

Lock Insert (2D)

PLSC side

Washer：
NAS620C416(t=1.6)
Fastener：
NAS1351N4-12(L=19.05)[mm]

Screw Depth
14.5 MINLightband® Upper ring

Figure B3-4 Interface Dimensions of Mating Sectionof Lightband® upper ring and Micro satellite rear frame

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Appendix B

Epsilon User’s Manual

Table B3-5 Allowable load of fastener and reference value of maximum axial force(A)

Initial Axial Force

UnitValue

Notes

N

8,494

Tightening Torque 10.1 [Nm]Assumed ambient temperature range: 14 to26°C
Increased heat load when the ambient(B)Heat LoadN

156.5

temperature rises to 26°C from 14°C
(fastener is tightened at 14°C).
If you need to extend the range, extrapolate
linearly (13 N/°C).

(C)Internal Coefficient(D)

External Force(E)-(Assumed)
Max Axial ForceStrength
Margin of Safety

―

0.53

Yield

N

8,363

UltimateN

10,453= D x 1.25

Yield

N

13,104= A+B+C x E

Ultimate

N

14,218= A+B+C x E

Yield

N

19,416

NAS1351N4

UltimateN

25,889

NAS1351N4

Yield

―

0.48

Ultimate―

0.82This value is stated in Lightband® UserManual.

(8) Separation Spring
The number and arrangement of separation springs will be defined in ICD.
Refer to Lightband® User Manual for the characteristics of separation springs.

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Appendix B

Epsilon User’s Manual(9) Separation Connector
Two separation connectors of Lightband® are used as standard.
The appearance of the separation connector is shown in Figure B3-5.
The specifications of the separation connector are shown in Table B3-6.
Refer to Chapter B4 for its electrical interface.

Figure B3-5 Separation Connector
Table B3-6 Specifications of Separation Connector
Number of connectors

2Connector Arrangement

See Figure B3-1.

Pin Arrangement

See Chapter B4 (Electrical Interface).

Spring characteristic

See Lightband® User Manual.

Procurement

By LV

B-12

Appendix B

Epsilon User’s Manual(10) Separation Switch
Two separation switches of Lightband® are used as standard.
The appearance of the separation switch is shown in Figure B3-6.
The specifications of the separation switch are shown in Table B3-7.
If 3 switches are needed, contact your Program Director.
Refer to Chapter B4 for its electrical interface.

Figure B3-6 Separation Switch
Table B3-7 Specifications of Separation Switch
Number of switch

2Switch Arrangement

See Figure B3-1.

Spring characteristic

See Lightband® User Manual.

Procurement

By LV

B-13

Appendix B

Epsilon User’s Manual

B4. Electrical Interface
B4. 1 Separation connector of Lightband®
Two separation connectors of Lightband® are used as standard. See Section B3 (9) for its appearance.
The electrical interface is shown in Table B4-1.
LV uses some pins on each separation connector as shown in Table B4-1 with short wires connected
for detecting separation status. Pins other than those used by LV are available for Customer.
Customer may use these separation connectors as separation switches; however, it should be notedthat the connectors have the normally open contact and that the status is open after separation. In
addition, LV does not guarantee any Micro satellite the use of the separation connectors after separationin its orbit.
Electrical connections between a Micro satellite and LV or launch site facilities are not provided via
umbilical line as standard.
Customer can access its PL for charging its battery or other operations before mating with Lightband®
or before encapsulation into PLF.
The separation connectors serve as bonding pass between Lightband® upper ring and its lower ring.
Table B4-1 Electrical Interface of Separation Connector
Number of connectors

2Connector Location

See Figure B3-1.

Pin Assignment

See Figure B4-1.

Pins used by LV

J11: pin No. 4, 11, 5, 13
J12: pin No. 5, 13

Procurement

By LV

Separationconnector
Separation Connector(Upper)(Upper Ring側)
J11,J12

Separation connector(Lower)Separation Connector(Lower Ring側)
P11,P121891581159

Figure B4-1 Pin Assignment
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Epsilon User’s Manual

B4. 2 Separation switch(1) Separation Switch of Lightband®
Two separation switches of Lightband® are used as standard. If 3 switches are needed, contact yourProgram Director. See Section B3 (10) for its appearance.
The electrical interface is shown in Table B4-2.
LV does not guarantee any Micro satellite the use of the separation switches in its orbit.

Table B4-2 Electrical interface of Separation Switch
Number of switches

2Switch Location

See Figure B3-1.

Switch TypeSPDT (Single-Pole Double-Throw)

Circuit Diagram

See Figure B4-2.

Procurement

By LV

Lightband® upper ring

Lightband® lower ring

* Separated stateFigure B4-2 Circuit Diagram of Separation Switch

B-15

Appendix B

Epsilon User’s Manual(2) Separation Switch provided by PL
PL can install separation switches chosen and provided by itself, instead of separation switches ofLightband®, on the Lightband® upper ring.
After PL connected with the Lightband, separation switches are inaccessible, and the dimensions
around them cannot be measured.
Strokes of the separation switches are defined in ICD because their movement in height direction areaffected by reaction force of the separation switches. Customer shall inform Program Director of thereaction force.
The separation switches of Lightband®

are recommended if Customer is to require high accuracy of

PL rate in separation because the separation springs are arranged based on reaction force of theseparation switches of Lightband®.
Since separation switches provided by PL can greatly increase PL rate in separation, Customer should
consult Program Director for their use.

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Epsilon User’s Manual

B4. 3 Bonding
Bonding is also described in Section 4.4.6.
PL is electrically connected with Lightband® upper ring via fasteners and inserts (Figure B4-3).
Customer shall confirm in advance that the resistance between two points as shown below meets therequired value described in Section 4.4.6.
(1) A head or washer of each fastener fixed on Lightband® upper ring(2) PL main structure
Bonding jumpers are also acceptable for ensuring the electrical connectivity .

Contact
surfaceis notContact
surfacedoes
notconductive.
have conduction.

Insert( No surface coating)
SC structure

Upper Ring

Bonding pass

Washersecures electrical
SC andLightband®
UpperPLconductivitybetween
PL andRing
can conductthrougha bolt
the Upper ring.

Upper
Separation
Connector
Lower
Separation
Connector

and a washer.

Lower Ring

LV structure

Figure B4-3 Bonding pass

B-17