Chapter 8. Appendix 1 – Instrument/channel names

The tables in this section show the names and codes of the streamed channels along with the record names and channel codes for recorded data. The first character “x” in miniSEED channel code represents the sample rate. The possible values are shown in the table below:

F	≥ 1000 Hz to < 5000 Hz
C	≥ 250 Hz to < 1000 Hz
H	≥ 80 Hz to < 250 Hz
B	≥ 10 Hz to < 80 Hz
M	> 1 to < 10
L	≈ 1
V	≈ 0.1 Hz
U	≈ 0.01 Hz
R	≥ 0.0001 Hz to < 0.001

The “Data record names” of the seismic channels and MEMS accelerometer channels are postfixed with “A” or “B”. This notation distinguishes between the two different sample rates that is possible to select for each recorded channel. For example, the recorded streams S0AccZA and S0AccZB carry digitisations of the same signal, differing only in the sample rate.

Note: Throughout this section, the letter n in italic script is used to indicate the Instrument number, which is a small integer used to identify the signal source. This is always zero ('0') for the Minimus' own internal sensors and for the first analogue instrument.

For Minimus units, Instruments 1, 2, … 8 are external Radian instruments in a string sharing a digital connection. Instrument 1 is the digital instrument closest to the Minimus.

⨹ For Minimus+ units, Instrument 1 is the second analogue sensor. Instruments 2, 3, … 9 are external Radian instruments in a string sharing a digital connection. Instrument 2 is the digital instrument closest to the Minimus+.

8.1 Minimus' internal sensors

Sensor	Comp.	Data streaming			Data recording
Sensor	Comp.	Digital filter mode	Live stream name	Live Stream code	Data record name	Mini SEED channel code
MEMS accelerometer	1	Acausal	S0AccZ	0AXL10	S0AccZA	xN1
		Acausal			S0AccZB	xN1
		Causal	S0AccelZLowLat	0AXL1C		xN1
	2	Acausal	S0AccN	0AXL20	S0AccNA	xN2
		Acausal			S0AccNB	xN2
		Causal	S0AccelNLowLat	0AXL2C		xN2
	3	Acausal	S0AccE	0AXL30	S0AccEA	xN3
		Acausal			S0AccEB	xN3
		Causal	S0AccelELowLat	0AXL3C		xN3
Magnetometer	1	Acausal	S0MagZ	0MAG10	S0MagZ	xF1
	2	Acausal	S0MagN	0MAG20	S0MagN	xF2
	3	Acausal	S0MagE	0MAG30	S0MagE	xF3
Input voltage		Acausal	S0Voltage	0VINP0	S0Voltage	xYV
Power
Humidity within the Minimus		Acausal	S0HumidA	0HUMA0	S0HumidA	xIO
Temperature	Precision temperature	Acausal	S0TemprA	0TMPA0	S0TemprA	xKO
Temperature	First derivative of temperature	Acausal	S0TemprD	0TMPD0		xKD
Internal Clock	Internal clock offset from GNSS	Acausal	ClkGpsOffset	0CGPSO	ClkGpsOffset	BEO
	Internal clock period difference from GNSS	Acausal	ClkGpsPeriod	0CGPSP	ClkGpsPeriod	BEF
	Internal clock DAC frequency pulling	Acausal	ClkDacFreqPull	0CVDAC	ClkDacFreqPull	BED
	Test internal clock drift	Acausal	ClkTestPbpS	0CTSTB	ClkTestPpbS	BEB
	Internal clock offset from PTP	Acausal	ClkPtpOffset	0CPTPO	ClkPtpOffset	BEP
	Delay MS	Acausal	ClkPtpDelayMS	0CPDMS	ClkPtpDelayMS	BEA
	Delay SM	Acausal	ClkPtpDelaySM	0CPDSM	ClkPtpDelaySM	BEB
	Mean path delay	Acausal	ClkPtpMeanPathDelay	0CPMPD	ClkPtpMeanPathDelay	BEC

8.2 Analogue Instruments

The italicised n in the codes is always set to zero ('0') for the first analogue instrument. ⨹ For Minimus+ units, it is set to 1 for the second analogue sensor. There is an Auxiliary input on each of the analogue sensor inputs on a Minimus+ and the streams from these are similarly identified by a 0 or 1.

Sensor	Comp.	Data streaming			Data recording
Sensor	Comp.	Digital filter mode	Live stream name	Live Stream code	Data record name	Mini SEED channel code
Analogue seismic sensor (velocimeter or accelerometer)	Vertical	Acausal	SnSeisZ	nVELZ0 or nACCZ0	SnSeisZA	xHZ or xNZ
		Acausal	SnSeisZ	nVELZ2 or nACCZ2	SnSeisZB	xHZ or xNZ
		Causal	SnSeisZLowLat	nVELZC or nACCZC	SenSeisZLowLat	xHZ or xNZ
	North	Acausal	SnSeisN	nVELN0 or nACCN0	SnSeisNA	xHN or xNN
		Acausal	SnSeisN	nVELN2 or nACCN2	SnSeisNB	xHN or xNN
		Causal	SnSeisNLowLat	nVELNC or nACCNC	SnSeisNLowLat	xHN or xNN
	East	Acausal	SnSeisE	nVELE0 or nACCE0	SnSeisEA	xHE or xNE
		Acausal	SnSeisE	nVELE2 or nACCE2	SnSeisEB	xHE or xNE
		Causal	SnSeisELowLat	nVELEC or nACCEC	SnSeisELowLat	xHE or xNE
Auxiliary input		Acausal	SnSeisX	nAUXX0	SnSeisX	xDF
Analogue seismic sensor mass positions	Vertical	Acausal	SnIntZ	nVELM8	SnIntZ	xMZ
	North	Acausal	SnIntN	nVELM9	SnIntN	xMN
	East	Acausal	SnIntE	nVELMA	SnIntE	xME
Calibration Channel		Acausal	SnCalib	nVELC (or nACCC)	SnCalib	xCA
Humidity within sensor enclosure		Acausal	SnHumidB	nHUMB0	SnHumidB	xIO
Pressure	Within sensor enclosure	Acausal	SnPressure	nPRSR0	SnPressure	xDI
Pressure	External	Acausal	SnExtPressure	nPRSR1	SnExtPressure	xDO
PLL clock offset		Acausal	SnPLLOffset	nPLLO0	SnPLLOffset	xYO

8.3 Digital Instruments

Digital instruments can be attached to the Minimus in a chain. The lowest number instrument is the one which is closest to the Minimus. On a Minimus, this is Instrument 1. ⨹ For Minimus+ units, it is Instrument 2.

Sensor	Comp	Data streaming			Data recording
Sensor	Comp	Digital filter mode	Live stream name	Live stream code	Data record name	MiniSEED channel code
Seismometer (velocity or acceleration response)	Vertical	Acausal	SnSeisZ	nVELZ0 or nACCZ0	SnSeisZA	xHZ or xNZ
		Acausal	SnSeisZ	nVELZ2 or nACCZ2	SnSeisZB	xHZ or xNZ
		Causal	SnSeisZLowLat	nVELZC or nACCZC	SnSeisZLowLat	xHZ or xNZ
	North	Acausal	SnSeisN	nVELN0 or nACCN0	SnSeisNA	xHN or xNN
		Acausal	SnSeisN	nVELN2 or nACCN2	SnSeisNB	xHN or xNN
		Causal	SnSeisNLowLat	nVELNC or nACCNC	SnSeisNLowLat	xHN or xNN
	East	Acausal	SnSeisE	nVELE0 or nACCE0	SnSeisEA	xHE or xNE
		Acausal	SnSeisE	nVELE2 or nACCE2	SnSeisEB	xHE or xNE
		Causal	SnSeisELowLat	nVELEC or nACCEC	SnSeisELowLat	xHE or xNE
Digital seismic sensor mass position	Vertical	Acausal	SnIntZ	nINTZ0	SnIntZ	xMZ
	North	Acausal	SnIntN	nINTN0	SnIntN	xMN
	East	Acausal	SnIntE	nINTE0	SnIntE	xME
MEMS accelerometer	Vertical	Acausal	SnAccZ	nAXLZ0	SnAccZA	xNZ
		Acausal			SnAccZB	xNZ
		Causal	SnAccZLowLat	nAXLZC		xNZ
	North	Acausal	SnAccN	nAXLN0	SnAccNA	xNN
		Acausal			SnAccNB	xNN
		Causal	SnAccNLowLat	nAXLNC		xNN
	East	Acausal	SnAccE	nAXLE0	SnAccEA	xNE
		Acausal			SnAccEB	xNE
		Causal	SnAccELowLat	nAXLEC		xNE
Magnetometer	Z	Acausal	SnMagZ	nMAGZ0	SnMagZ	xFZ
	N	Acausal	SnMagN	nMAGN0	SnMagN	xFN
	E	Acausal	SnMagE	nMAGE0	SnMagE	xFE
	Yaw	Acausal	SnRotYaw	nROTY0	SnRotYaw	xYY
	Pitch	Acausal	SnRotPitch	nROTP0	SnRotPitch	xYP
	Roll	Acausal	SnRotRoll	nROTR0	SnRotRoll	XYR
Temperature		Acausal	SnTemprB	nTMPB0	SensornTemprBRough	xKO
Humidity within sensor enclosure		Acausal	SnHumidB	nHUMB0	SnHumidB	xIO
Pressure	Within sensor enclosure	Acausal	SnPressure	nPRSR0	SnPressure	xDI
Pressure	External	Acausal	SnExtPressure	nPRSR1	SnExtPressure	xDO
PLL clock offset		Acausal	SnPLLOffset	nPLLO0	SnPLLOffset	xYO
Sensor power		Acausal	SnPower	nPWR0	SnPower	xE0
Sensor input voltage		Acausal	SnVoltage	nVOLT0	SnVoltage	xE1