Consideration of Potential Age-Limiting Observations To Be Used To Compute 2020.00 Reference Epoch Coordinates in the National Spatial Reference System, 44865 [2020-16084]
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Federal Register / Vol. 85, No. 143 / Friday, July 24, 2020 / Notices
DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric
Administration
Consideration of Potential AgeLimiting Observations To Be Used To
Compute 2020.00 Reference Epoch
Coordinates in the National Spatial
Reference System
The Office of the National
Geodetic Survey (NGS), National Ocean
Service (NOS), National Oceanic and
Atmospheric Administration (NOAA),
Department of Commerce (DOC).
ACTION: Request for information.
AGENCY:
The National Geodetic Survey
(NGS) is considering imposing age
limits on the observations that will be
used in the creation of 2020.00
Reference Epoch Coordinates (RECs), as
part of the modernization of the
National Spatial Reference System
(NSRS). Due to expected uncertainties
in the vertical component of the IntraFrame Velocity Model (IFVM), the age
limits cannot be determined until wellstructured, data-driven experiments
have been conducted. Such experiments
are expected to occur during the 2020
reference epoch adjustment projects
(geometric, orthometric and
gravimetric), which are scheduled for
calendar year 2022. Therefore, NGS
requests that users take new Global
Navigation Satellite System (GNSS)
observations on geodetic control marks
of interest, especially those marks that
have not been surveyed since January 1,
2010, and share them with NGS before
December 31, 2021.
DATES: The effective date of this
announcement is upon publication of
this notice. Submission of GNSS
observations on geodetic control marks
of interest are requested before
December 31, 2021.
ADDRESSES: National Geodetic Survey,
1315 East-West Highway, Silver Spring,
MD 20910.
FOR FURTHER INFORMATION CONTACT: Dr.
Dru Smith, NSRS Modernization
Manager, by email at dru.smith@
noaa.gov, by phone at (240) 533–9654,
or by mail at NOAA/NOS/NGS 1315
East-West Highway, Silver Spring, MD,
20910.
SUPPLEMENTARY INFORMATION: In 2017,
the National Geodetic Survey (NGS)
announced its plans to estimate RECs on
a five-year cycle in NOAA Technical
Report NOS NGS 67, 2019, starting with
the first reference epoch at 2020.00, as
part of the modernization of the NSRS.
In the Technical Report, the exact
observations to be used for this
estimation were listed as ‘‘To Be
jbell on DSKJLSW7X2PROD with NOTICES
SUMMARY:
VerDate Sep<11>2014
20:45 Jul 23, 2020
Jkt 250001
Determined.’’ Now, NGS is considering
imposing age limits upon the
observations that will be used,
particularly because of expected
uncertainties in the vertical component
of the IFVM. These age limits cannot be
determined until additional wellstructured, data-driven experiments are
conducted. Such experiments are
expected to occur during the 2020
reference epoch adjustment projects
(geometric, orthometric, and
gravimetric), which are scheduled for
calendar year 2022.
However, since the cut-off for new
observations to enter those adjustment
projects is December 31, 2021, any
decision to age-limit input observations
will come too late for submissions to
impact the 2020 RECs. While the cut-off
for age-limited observations is
unknown, certain assumptions are safe
to make. For instance, it is unlikely that
such an age-limit will be fewer than 10
years. Older observations may be used
in the estimation of 2020 RECs, but this
cannot be guaranteed. As such, NGS
requests that users take new GNSS
observations on geodetic control marks
of interest that have not been surveyed
since January 1, 2010, and asks the users
to submit the observations to NGS
before December 31, 2021. Users may
either (a) submit existing unsubmitted
observations through the OPUS-Share
tool or (b) conduct new GNSS
observations and submit the data to
NGS via the OPUS-Share tool.
In order to increase the submission of
GNSS observations on marks, NGS is
prioritizing the finalization of an
expanded OPUS-Projects tool, which
will allow real-time kinematic and real
time network (RTK/RTN) observations
to be submitted, rather than the
standard four-hour observations
required in OPUS-Share. Initial roll-out
of this new tool is expected to occur
during calendar year 2020.
This action is designed to increase
both the number and the coordinate
accuracy of geodetic control points,
which in the modernized NSRS will
have an estimated 2020.00 REC.
Historically, NGS has combined data
across multiple decades to estimate
geodetic coordinates, yet such efforts
have not fully accounted for the lack of
information about vertical motion of
geodetic control points throughout the
years. Since height information is
critical to the understanding of floods,
failure to compute heights accurately
can have negative impacts on property
and lives. NGS views periodic resurveys of geodetic control points,
rather than the estimation of coordinates
from observations that are years (or even
decades) old, as the most effective way
PO 00000
Frm 00018
Fmt 4703
Sfmt 4703
44865
to maintain accurate and up-to-date
knowledge of geodetic coordinates,
including heights. As such, this
announcement provides users of the
NSRS with advance notice that geodetic
control points of interest to them should
be re-surveyed for the most accurate
representation of geodetic coordinates,
including heights.
(Authority: Coast and Geodetic Survey Act
of 1947, 33 U.S.C. 883a et seq.)
Juliana P. Blackwell,
Director, National Geodetic Survey, National
Ocean Service, National Oceanic and
Atmospheric Administration.
[FR Doc. 2020–16084 Filed 7–23–20; 8:45 am]
BILLING CODE 3510–JE–P
COMMITTEE FOR PURCHASE FROM
PEOPLE WHO ARE BLIND OR
SEVERELY DISABLED
Procurement List; Proposed Deletions
Committee for Purchase From
People Who Are Blind or Severely
Disabled.
ACTION: Proposed Deletions from the
Procurement List.
AGENCY:
The Committee is proposing
to delete products and services on the
Procurement List furnished by nonprofit
agencies employing persons who are
blind or have other severe disabilities.
DATES: Comments must be received on
or before: August 23, 2020.
ADDRESSES: Committee for Purchase
From People Who Are Blind or Severely
Disabled, 1401 S. Clark Street, Suite
715, Arlington, Virginia, 22202–4149.
FOR FURTHER INFORMATION CONTACT: For
further information or to submit
comments contact: Michael R.
Jurkowski, Telephone: (703) 603–2117,
Fax: (703) 603–0655, or email
CMTEFedReg@AbilityOne.gov.
SUPPLEMENTARY INFORMATION: This
notice is published pursuant to 41
U.S.C. 8503 (a)(2) and 41 CFR 51–2.3. Its
purpose is to provide interested persons
an opportunity to submit comments on
the proposed actions.
SUMMARY:
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The following products and services
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Products
NSN(s)—Product Name(s):
8415–01–587–9853—Drawers, Underwear,
Midweight Fire Retardant, FREE, Army,
Desert Sand, XSS
8415–01–587–9855—Drawers, Underwear,
Midweight Fire Retardant, FREE, Army,
Desert Sand, XSR
E:\FR\FM\24JYN1.SGM
24JYN1
]]>Agencies
[Federal Register Volume 85, Number 143 (Friday, July 24, 2020)]
[Notices]
[Page 44865]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-16084]
[[Page 44865]]
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DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
Consideration of Potential Age-Limiting Observations To Be Used
To Compute 2020.00 Reference Epoch Coordinates in the National Spatial
Reference System
AGENCY: The Office of the National Geodetic Survey (NGS), National
Ocean Service (NOS), National Oceanic and Atmospheric Administration
(NOAA), Department of Commerce (DOC).
ACTION: Request for information.
-----------------------------------------------------------------------
SUMMARY: The National Geodetic Survey (NGS) is considering imposing age
limits on the observations that will be used in the creation of 2020.00
Reference Epoch Coordinates (RECs), as part of the modernization of the
National Spatial Reference System (NSRS). Due to expected uncertainties
in the vertical component of the Intra-Frame Velocity Model (IFVM), the
age limits cannot be determined until well-structured, data-driven
experiments have been conducted. Such experiments are expected to occur
during the 2020 reference epoch adjustment projects (geometric,
orthometric and gravimetric), which are scheduled for calendar year
2022. Therefore, NGS requests that users take new Global Navigation
Satellite System (GNSS) observations on geodetic control marks of
interest, especially those marks that have not been surveyed since
January 1, 2010, and share them with NGS before December 31, 2021.
DATES: The effective date of this announcement is upon publication of
this notice. Submission of GNSS observations on geodetic control marks
of interest are requested before December 31, 2021.
ADDRESSES: National Geodetic Survey, 1315 East-West Highway, Silver
Spring, MD 20910.
FOR FURTHER INFORMATION CONTACT: Dr. Dru Smith, NSRS Modernization
Manager, by email at [email protected], by phone at (240) 533-9654, or
by mail at NOAA/NOS/NGS 1315 East-West Highway, Silver Spring, MD,
20910.
SUPPLEMENTARY INFORMATION: In 2017, the National Geodetic Survey (NGS)
announced its plans to estimate RECs on a five-year cycle in NOAA
Technical Report NOS NGS 67, 2019, starting with the first reference
epoch at 2020.00, as part of the modernization of the NSRS. In the
Technical Report, the exact observations to be used for this estimation
were listed as ``To Be Determined.'' Now, NGS is considering imposing
age limits upon the observations that will be used, particularly
because of expected uncertainties in the vertical component of the
IFVM. These age limits cannot be determined until additional well-
structured, data-driven experiments are conducted. Such experiments are
expected to occur during the 2020 reference epoch adjustment projects
(geometric, orthometric, and gravimetric), which are scheduled for
calendar year 2022.
However, since the cut-off for new observations to enter those
adjustment projects is December 31, 2021, any decision to age-limit
input observations will come too late for submissions to impact the
2020 RECs. While the cut-off for age-limited observations is unknown,
certain assumptions are safe to make. For instance, it is unlikely that
such an age-limit will be fewer than 10 years. Older observations may
be used in the estimation of 2020 RECs, but this cannot be guaranteed.
As such, NGS requests that users take new GNSS observations on geodetic
control marks of interest that have not been surveyed since January 1,
2010, and asks the users to submit the observations to NGS before
December 31, 2021. Users may either (a) submit existing unsubmitted
observations through the OPUS-Share tool or (b) conduct new GNSS
observations and submit the data to NGS via the OPUS-Share tool.
In order to increase the submission of GNSS observations on marks,
NGS is prioritizing the finalization of an expanded OPUS-Projects tool,
which will allow real-time kinematic and real time network (RTK/RTN)
observations to be submitted, rather than the standard four-hour
observations required in OPUS-Share. Initial roll-out of this new tool
is expected to occur during calendar year 2020.
This action is designed to increase both the number and the
coordinate accuracy of geodetic control points, which in the modernized
NSRS will have an estimated 2020.00 REC. Historically, NGS has combined
data across multiple decades to estimate geodetic coordinates, yet such
efforts have not fully accounted for the lack of information about
vertical motion of geodetic control points throughout the years. Since
height information is critical to the understanding of floods, failure
to compute heights accurately can have negative impacts on property and
lives. NGS views periodic re-surveys of geodetic control points, rather
than the estimation of coordinates from observations that are years (or
even decades) old, as the most effective way to maintain accurate and
up-to-date knowledge of geodetic coordinates, including heights. As
such, this announcement provides users of the NSRS with advance notice
that geodetic control points of interest to them should be re-surveyed
for the most accurate representation of geodetic coordinates, including
heights.
(Authority: Coast and Geodetic Survey Act of 1947, 33 U.S.C.
883a et seq.)
Juliana P. Blackwell,
Director, National Geodetic Survey, National Ocean Service, National
Oceanic and Atmospheric Administration.
[FR Doc. 2020-16084 Filed 7-23-20; 8:45 am]
BILLING CODE 3510-JE-P
