International Federation of Digital Seismograph Networks
Thread: proposal new blockettes
Reinoud Sleeman
Dear WG-II members,
I received the following request from JAMSTEC for 2 new blockettes within SEED,
including a detailed description (see attached file):
______________________________________________________________________
One is ``Delay time Information Blockette" which describes breakdown of total
delay time. The other is ``Quartz Pressure Blockette" which includes 14 coefficients
to convert count value of quartz-type pressure gauge data to physical value.
1. ``Delay time Information Blockette"
We are going to install some seismometers and quartz-type pressure gauges in seafloor this year.
The clock time of seafloor data stamped at land base station is different from the time in seafloor
observation because of the delay of time from sensor to seafloor station, node point of optic submarine
cable, and the land base station.
This time difference is corrected in the land base station, and the time correction is written in field
16 (100 micro-sec unit) in Fixed Section of Data Header.
We here want to describe the breakdown of total delay time in SEED and to utilize the system check of
data transfer and the acquisition of more precise (more than 100 micro-sec precision) time at sensor in
seafloor.
We want to define the new blockette on delay time for seafloor observation.
2. ``Quartz Pressure Blockette"
We observe water pressure using quartz-type pressure gauge (Paroscientific, Inc.).
This gauge is monitoring not only water pressure but also temperature in frequency domain for high-
accuracy measurement.
Data user needs to use conversion equations and 14 conversion coefficients if they analyze the data with
physical value such as Pascal unit.
We want to define the new blockette on the coefficient for quartz-type pressure gauge.
_____________________________________________________________________________
I'm not an expert in this type of measurements but the proposed blockettes seems OK for me
within the SEED format. Please give me your opinion, if any. If there are no objections within 3
weeks I will approve this proposal.
Best regards
Reinoud
I received the following request from JAMSTEC for 2 new blockettes within SEED,
including a detailed description (see attached file):
______________________________________________________________________
One is ``Delay time Information Blockette" which describes breakdown of total
delay time. The other is ``Quartz Pressure Blockette" which includes 14 coefficients
to convert count value of quartz-type pressure gauge data to physical value.
1. ``Delay time Information Blockette"
We are going to install some seismometers and quartz-type pressure gauges in seafloor this year.
The clock time of seafloor data stamped at land base station is different from the time in seafloor
observation because of the delay of time from sensor to seafloor station, node point of optic submarine
cable, and the land base station.
This time difference is corrected in the land base station, and the time correction is written in field
16 (100 micro-sec unit) in Fixed Section of Data Header.
We here want to describe the breakdown of total delay time in SEED and to utilize the system check of
data transfer and the acquisition of more precise (more than 100 micro-sec precision) time at sensor in
seafloor.
We want to define the new blockette on delay time for seafloor observation.
2. ``Quartz Pressure Blockette"
We observe water pressure using quartz-type pressure gauge (Paroscientific, Inc.).
This gauge is monitoring not only water pressure but also temperature in frequency domain for high-
accuracy measurement.
Data user needs to use conversion equations and 14 conversion coefficients if they analyze the data with
physical value such as Pascal unit.
We want to define the new blockette on the coefficient for quartz-type pressure gauge.
_____________________________________________________________________________
I'm not an expert in this type of measurements but the proposed blockettes seems OK for me
within the SEED format. Please give me your opinion, if any. If there are no objections within 3
weeks I will approve this proposal.
Best regards
Reinoud
-
Hi, Reinoud-
I think what would help is a recommendation for what the blockette
number is that they propose (are they talking data record blockette
so we'd have a blockette 300 or 3000 type of addition, or is this
in the station headers. A specific proposal for what to number these.
You mention there was an attached file, but unless you are referring to
the inline text, we did not receive an "attachment" per se.
Thanks
Rick
On Apr 21, 2010, at 12:22 PM, Sleeman, Reinoud (KNMI) wrote:
Dear WG-II members,
================
I received the following request from JAMSTEC for 2 new blockettes within SEED,
including a detailed description (see attached file):
______________________________________________________________________
One is ``Delay time Information Blockette" which describes breakdown of total
delay time. The other is ``Quartz Pressure Blockette" which includes 14 coefficients
to convert count value of quartz-type pressure gauge data to physical value.
1. ``Delay time Information Blockette"
We are going to install some seismometers and quartz-type pressure gauges in seafloor this year.
The clock time of seafloor data stamped at land base station is different from the time in seafloor
observation because of the delay of time from sensor to seafloor station, node point of optic submarine
cable, and the land base station.
This time difference is corrected in the land base station, and the time correction is written in field
16 (100 micro-sec unit) in Fixed Section of Data Header.
We here want to describe the breakdown of total delay time in SEED and to utilize the system check of
data transfer and the acquisition of more precise (more than 100 micro-sec precision) time at sensor in
seafloor.
We want to define the new blockette on delay time for seafloor observation.
2. ``Quartz Pressure Blockette"
We observe water pressure using quartz-type pressure gauge (Paroscientific, Inc.).
This gauge is monitoring not only water pressure but also temperature in frequency domain for high-
accuracy measurement.
Data user needs to use conversion equations and 14 conversion coefficients if they analyze the data with
physical value such as Pascal unit.
We want to define the new blockette on the coefficient for quartz-type pressure gauge.
_____________________________________________________________________________
I'm not an expert in this type of measurements but the proposed blockettes seems OK for me
within the SEED format. Please give me your opinion, if any. If there are no objections within 3
weeks I will approve this proposal.
Best regards
Reinoud
_______________________________________________
fdsn-wg2-data mailing list
fdsn-wg2-data<at>iris.washington.edu
http://www.iris.washington.edu/mailman/listinfo/fdsn-wg2-data
Rick Benson
Director of Operations
IRIS DMC
(206)547-0393 ext. 119(office)
rick<at>iris.washington.edu
-
Thanks, Rick - please find the attachment here.
R
Attachments
-
Dear WG-II,
Regarding the two proposed data blockettes:
1) The "Delay time Information Blockette" seems reasonable and we would suggest that it be accompanied by a paragraph describing the intended use, such as is done for blockette 405. We are assuming that is this is a bookkeeping blockette that documents components of the total time correction in field 16 of the fixed section data header, please let us know if we misunderstood the intention. The descriptive paragraph should clearly state that data parsers do not need to perform any further operation when encountering this blockette to determine sample times. A less important characteristic is the usage of "10001" as a blockette type, we would recommended "2001".
2) We feel the proposal for a "Quartz Pressure Blockette" is too specific being limited to a particular instrument type, a general solution would be preferred.
Also it is not clear if the coefficients are changing continuously and represent the actual data stream or are they fixed for a given set of input values. We ask the authors to clarify.
In the case where the coefficients represent the actual data an alternative solution might be the use of blockette 2000 which can contain nearly any data.
In the case where the coefficients are fixed for a given set of input samples the question arises for why this would be a data blockette instead of written as a station control header blockette. Blockette 62 could potentially be extended by defining a new response type (equation), similar to the entry for the MacLaurirn pressure sensors, and create a new field 7.
regards,
Chad Trabant
Tim Ahern
Rick Benson
On Apr 21, 2010, at 12:22 PM, Sleeman, Reinoud (KNMI) wrote:
Dear WG-II members,
I received the following request from JAMSTEC for 2 new blockettes within SEED,
including a detailed description (see attached file):
______________________________________________________________________
One is ``Delay time Information Blockette" which describes breakdown of total
delay time. The other is ``Quartz Pressure Blockette" which includes 14 coefficients
to convert count value of quartz-type pressure gauge data to physical value.
1. ``Delay time Information Blockette"
We are going to install some seismometers and quartz-type pressure gauges in seafloor this year.
The clock time of seafloor data stamped at land base station is different from the time in seafloor
observation because of the delay of time from sensor to seafloor station, node point of optic submarine
cable, and the land base station.
This time difference is corrected in the land base station, and the time correction is written in field
16 (100 micro-sec unit) in Fixed Section of Data Header.
We here want to describe the breakdown of total delay time in SEED and to utilize the system check of
data transfer and the acquisition of more precise (more than 100 micro-sec precision) time at sensor in
seafloor.
We want to define the new blockette on delay time for seafloor observation.
2. ``Quartz Pressure Blockette"
We observe water pressure using quartz-type pressure gauge (Paroscientific, Inc.).
This gauge is monitoring not only water pressure but also temperature in frequency domain for high-
accuracy measurement.
Data user needs to use conversion equations and 14 conversion coefficients if they analyze the data with
physical value such as Pascal unit.
We want to define the new blockette on the coefficient for quartz-type pressure gauge.
_____________________________________________________________________________
I'm not an expert in this type of measurements but the proposed blockettes seems OK for me
within the SEED format. Please give me your opinion, if any. If there are no objections within 3
weeks I will approve this proposal.
Best regards
Reinoud
_______________________________________________
fdsn-wg2-data mailing list
fdsn-wg2-data<at>iris.washington.edu
http://www.iris.washington.edu/mailman/listinfo/fdsn-wg2-data
-
Dear members of WG-II
I am sorry for late replies to the comments. We try to clarify our proposal
in the following explanation. Please let us know if we need further
explanation.
Thank you very much.
Seiji Tsuboi
1) This blockette documents components of the total time correction.
As you pointed out, data users do not need to perform any further operation
when encountering this blockette to determine sample times. This blockette
also enables us to derive more precise time information, which depends on
the frequency corresponding to the time unit (field 8,9,10), at each
data-transfer stage before applying time correction. We modified the
explanation of this blockette and temporarily named blockette 2001. Please
see the attached file.
2) To clalify the instrument what we are suing, we would explain some
details.
The quartz pressure gauge we install outputs periods of temperature and
pressure.
Data users need to use conversion equations and 14 conversion coefficients
if they analyze the data with physical value such as Pascal unit.
The conversion equations are as follows:
Temperature=Y1*U^1+Y2*U^2+Y3*U^3 (physical value)
U:Measured period of temperature (sensor output)
Y1-Y3:Coefficinets
Pressure=C(1-T0^2/T^2)(1-D(1-T0^2/T^2)) (physical value)
C=C1+C2*U^1+C3*U^2
D=D1+D2*U^1
T0=T1+T2*U^1+T3*U^2+T4*U^3+T5*U^4
T:Measured period of pressure (sensor output)
C1-C3, D1-D2, T1-T5:Coefficients
The coefficients are fixed for a given set of input samples.
For pressure, the equation is complex and is not a polynomial equation,
which may be different with an assumption of the Blockette 62 (Response
[Polynomial] Blockette).
Could you tell me whether we can extend or create a new field 7 of the
Blockette 62 for the above pressure equation?
We want to avoid the use of Maclaurin expansion because of the problem of
the precision of data conversion.
As another way, is it better to use the Blockette 62 to document the
coefficient and also use the Blockette 31 to explain the above complex
equation?
-----Original Message-----
know
From: fdsn-wg2-data-bounces<at>iris.washington.edu
[fdsn-wg2-data-bounces<at>iris.washington.edu] On Behalf Of Chad
Trabant
Sent: Friday, April 23, 2010 6:15 AM
To: fdsn-wg2-data<at>iris.washington.edu
Subject: Re: [fdsn-wg2-data] proposal new blockettes
Dear WG-II,
Regarding the two proposed data blockettes:
1) The "Delay time Information Blockette" seems reasonable and we would
suggest that it be accompanied by a paragraph describing the intended use,
such as is done for blockette 405. We are assuming that is this is a
bookkeeping blockette that documents components of the total time
correction in field 16 of the fixed section data header, please let us
if we misunderstood the intention. The descriptive paragraph should
operation
clearly state that data parsers do not need to perform any further
when encountering this blockette to determine sample times. A less
input
important characteristic is the usage of "10001" as a blockette type, we
would recommended "2001".
2) We feel the proposal for a "Quartz Pressure Blockette" is too specific
being limited to a particular instrument type, a general solution would
be preferred.
Also it is not clear if the coefficients are changing continuously and
represent the actual data stream or are they fixed for a given set of
values. We ask the authors to clarify.
alternative
In the case where the coefficients represent the actual data an
solution might be the use of blockette 2000 which can contain nearly any
samples
data.
In the case where the coefficients are fixed for a given set of input
the question arises for why this would be a data blockette instead of
written
as a station control header blockette. Blockette 62 could potentially be
within
extended by defining a new response type (equation), similar to the entry
for the MacLaurirn pressure sensors, and create a new field 7.
regards,
Chad Trabant
Tim Ahern
Rick Benson
On Apr 21, 2010, at 12:22 PM, Sleeman, Reinoud (KNMI) wrote:
Dear WG-II members,
I received the following request from JAMSTEC for 2 new blockettes
SEED,
gauges
including a detailed description (see attached file):
______________________________________________________________________
One is ``Delay time Information Blockette" which describes breakdown of
total
delay time. The other is ``Quartz Pressure Blockette" which includes 14
coefficients
to convert count value of quartz-type pressure gauge data to physical
value.
1. ``Delay time Information Blockette"
We are going to install some seismometers and quartz-type pressure
in seafloor this year.
different
The clock time of seafloor data stamped at land base station is
from the time in seafloor
station,
observation because of the delay of time from sensor to seafloor
node point of optic submarine
micro-sec
cable, and the land base station.
correction is written in field
This time difference is corrected in the land base station, and the time
16 (100 micro-sec unit) in Fixed Section of Data Header.
to utilize the system check of
We here want to describe the breakdown of total delay time in SEED and
data transfer and the acquisition of more precise (more than 100
precision) time at sensor in
observation.
seafloor.
We want to define the new blockette on delay time for seafloor
coefficients2. ``Quartz Pressure Blockette"
(Paroscientific, Inc.).
We observe water pressure using quartz-type pressure gauge
This gauge is monitoring not only water pressure but also temperature
in frequency domain for high-
accuracy measurement.
Data user needs to use conversion equations and 14 conversion
if they analyze the data with
blockettes
physical value such as Pascal unit.
pressure gauge.
We want to define the new blockette on the coefficient for quartz-type
______________________________________________________________________
_______
I'm not an expert in this type of measurements but the proposed
seems OK for me
within the SEED format. Please give me your opinion, if any. If there
are no objections within 3
weeks I will approve this proposal.
_______________________________________________
Best regards
Reinoud
_______________________________________________
fdsn-wg2-data mailing list
fdsn-wg2-data<at>iris.washington.edu
http://www.iris.washington.edu/mailman/listinfo/fdsn-wg2-data
fdsn-wg2-data mailing list
fdsn-wg2-data<at>iris.washington.edu
http://www.iris.washington.edu/mailman/listinfo/fdsn-wg2-data
Attachments
-
-
Dear WG-II members,
We have proposed new blocketts for a while ago. I would be grateful if you
would let us know any problems concerning with this proposal.
Thank you very much.
Seiji Tsuboi
-----Original Message-----
observation.
From: fdsn-wg2-data-bounces<at>iris.washington.edu
[fdsn-wg2-data-bounces<at>iris.washington.edu] On Behalf Of Sleeman,
Reinoud (KNMI)
Sent: Thursday, April 22, 2010 4:23 AM
To: fdsn-wg2-data<at>iris.washington.edu
Subject: [fdsn-wg2-data] proposal new blockettes
Dear WG-II members,
I received the following request from JAMSTEC for 2 new blockettes within
SEED, including a detailed description (see attached file):
______________________________________________________________________
One is ``Delay time Information Blockette" which describes breakdown of
totaldelay time. The other is ``Quartz Pressure Blockette" which includes
14coefficients to convert count value of quartz-type pressure gauge data
to physical value.
1. ``Delay time Information Blockette"
We are going to install some seismometers and quartz-type pressure gauges
in seafloor this year.
The clock time of seafloor data stamped at land base station is different
from the time in seafloor
observation because of the delay of time from sensor to seafloor station,
node point of optic submarine
cable, and the land base station.
This time difference is corrected in the land base station, and the time
correction is written in field
16 (100 micro-sec unit) in Fixed Section of Data Header.
We here want to describe the breakdown of total delay time in SEED and to
utilize the system check of
data transfer and the acquisition of more precise (more than 100 micro-sec
precision) time at sensor in
seafloor.
We want to define the new blockette on delay time for seafloor
2. ``Quartz Pressure Blockette"
(Paroscientific,
We observe water pressure using quartz-type pressure gauge
Inc.).
This gauge is monitoring not only water pressure but also temperature in
frequency domain for high-
accuracy measurement.
Data user needs to use conversion equations and 14 conversion coefficients
if they analyze the data with
physical value such as Pascal unit.
We want to define the new blockette on the coefficient for quartz-type
pressure gauge.
______________________________________________________________________
_______
I'm not an expert in this type of measurements but the proposed blockettes
seems OK for me
within the SEED format. Please give me your opinion, if any. If there are
no objections within 3
weeks I will approve this proposal.
Best regards
Reinoud
_______________________________________________
fdsn-wg2-data mailing list
fdsn-wg2-data<at>iris.washington.edu
http://www.iris.washington.edu/mailman/listinfo/fdsn-wg2-data
-
Dear WG-II members,
Sorry for sending this email repeatedly but I would be grateful if you would
consider this issue and send us any possible problems.
Thank you very much.
Seiji Tsuboi
-----Original Message-----
within
From: fdsn-wg2-data-bounces<at>iris.washington.edu
[fdsn-wg2-data-bounces<at>iris.washington.edu] On Behalf Of Seiji
Tsuboi
Sent: Monday, December 20, 2010 4:13 PM
To: 'Sleeman, Reinoud (KNMI)'; fdsn-wg2-data<at>iris.washington.edu
Subject: Re: [fdsn-wg2-data] proposal new blockettes
Dear WG-II members,
We have proposed new blocketts for a while ago. I would be grateful if you
would let us know any problems concerning with this proposal.
Thank you very much.
Seiji Tsuboi
-----Original Message-----
Sleeman,
From: fdsn-wg2-data-bounces<at>iris.washington.edu
[fdsn-wg2-data-bounces<at>iris.washington.edu] On Behalf Of
Reinoud (KNMI)
Sent: Thursday, April 22, 2010 4:23 AM
To: fdsn-wg2-data<at>iris.washington.edu
Subject: [fdsn-wg2-data] proposal new blockettes
Dear WG-II members,
I received the following request from JAMSTEC for 2 new blockettes
includesSEED, including a detailed description (see attached file):
______________________________________________________________________
One is ``Delay time Information Blockette" which describes breakdown of
totaldelay time. The other is ``Quartz Pressure Blockette" which
gauges14coefficients to convert count value of quartz-type pressure gauge data
to physical value.
1. ``Delay time Information Blockette"
We are going to install some seismometers and quartz-type pressure
differentin seafloor this year.
The clock time of seafloor data stamped at land base station is
station,from the time in seafloor
observation because of the delay of time from sensor to seafloor
micro-secnode point of optic submarine
to
cable, and the land base station.
This time difference is corrected in the land base station, and the time
correction is written in field
16 (100 micro-sec unit) in Fixed Section of Data Header.
We here want to describe the breakdown of total delay time in SEED and
utilize the system check of
data transfer and the acquisition of more precise (more than 100
coefficientsprecision) time at sensor in
observation.
seafloor.
We want to define the new blockette on delay time for seafloor
2. ``Quartz Pressure Blockette"
(Paroscientific,
We observe water pressure using quartz-type pressure gauge
Inc.).
in
This gauge is monitoring not only water pressure but also temperature
frequency domain for high-
accuracy measurement.
Data user needs to use conversion equations and 14 conversion
blockettesif they analyze the data with
______________________________________________________________________
physical value such as Pascal unit.
We want to define the new blockette on the coefficient for quartz-type
pressure gauge.
_______
I'm not an expert in this type of measurements but the proposed
seems OK for me
are
within the SEED format. Please give me your opinion, if any. If there
no objections within 3
_______________________________________________
weeks I will approve this proposal.
Best regards
Reinoud
_______________________________________________
fdsn-wg2-data mailing list
fdsn-wg2-data<at>iris.washington.edu
http://www.iris.washington.edu/mailman/listinfo/fdsn-wg2-data
fdsn-wg2-data mailing list
fdsn-wg2-data<at>iris.washington.edu
http://www.iris.washington.edu/mailman/listinfo/fdsn-wg2-data
-
Rick Benson
Chad Trabant
Seiji Tsuboi