DISPATCH_MNSPBIDTRK

DISPATCH_MNSPBIDTRK shows the MNSP bid tracking, including the bid version used in each dispatch run for each MNSP Interconnector Link. The table identifies which bids from MNSP_DAYOFFER and MNSP_BIDOFFERPERIOD were applied.

DISPATCH_MNSPBIDTRK shows own details for participant as they occur, with all details until close of business yesterday being available to all participants after end of day.

Source

DISPATCH_MNSPBIDTRK potentially updates every 5 minutes.

Volume

220, 000 per year

Column Schema

LINKID

Identifier for each of the two MNSP Interconnector Links. Each link pertains to the direction from and to.

SQL Type: VARCHAR2(10) Polars Type: str

This column is mandatory, and a primary key.

Examples:

BLNKTAS
BLNKVIC

PARTICIPANTID

Participant that owns unit during effective record period

For more information, see the dedicated documentation page.

SQL Type: VARCHAR2(10) Polars Type: pl.Categorical

This column is mandatory, and a primary key.

Example: BASSLINK

SETTLEMENTDATE

Market date starting at 04:05

Warning

Despite what the name suggests, this is a datetime, not a date.

SQL Type: DATE Polars Type: pl.Datetime()

This column is mandatory, and a primary key.

Example: 2026/06/01 00:05:00

RUNNO

Dispatch run no; always 1

This column only ever takes one value: 1

(The SQL type is NUMBER(3,0).)

AEMO marked this column as mandatory, and a primary key. However, since it only ever takes one value, you can ignore it.

LASTCHANGED

Record creation timestamp

For more information, see the dedicated documentation page.

SQL Type: DATE Polars Type: pl.Datetime()

This column is not mandatory.

Example: 2026/06/01 00:00:03

OFFEREFFECTIVEDATE

Time this bid was processed and loaded

SQL Type: TIMESTAMP(3) Polars Type: pl.Datetime()

This column is not mandatory.

Example: 2026/05/31 23:56:05.000

Unlike most datetime columns, this one includes a millisecond component. e.g. 2029/03/15 00:00:00.123.

OFFERSETTLEMENTDATE

Offer date for bid

SQL Type: DATE Polars Type: pl.Date()

This column is not mandatory.

Example: 2026/05/31 00:00:00

Note that AEMO represents dates as datetimes with a midnight time component.

OFFERVERSIONNO

VersionNo of the bid/offer used

SQL Type: NUMBER(3,0) Polars Type: pl.Int16

This column is not mandatory.

Example: 1

New Data Timing

Every 5 minutes

Code Examples

Polars

Casting is enums, categoricals etc is not essential, but may speed up parsing. Swapping int for pl.UInt16, pl.Int32 would also speed up parsing. However some of the datatypes are inferred, so they may be wrong.

This code deduplicates for you. Deduplication is normally only required across multiple months.

This code assumes that all columns are present, which may not be true for older files.

import polars as pl
import polars.selectors as cs

# e.g. "2029/03/15 00:05:00"
dt_s_fmt = "%Y/%m/%d %H:%M:%S"

# Dates are represented as datetimes at midnight

d_fmt = "%Y/%m/%d 00:00:00"

# for "TIMESTAMP" columns
# Note that Polars uses slightly different format strings for fractional seconds to `dt.strptime`
# e.g. "2029/03/15 00:00:00.123".
dt_ms_fmt = "%Y/%m/%d %H:%M:%S%.3f"

csv_paths = ["SOMEFILE.CSV", "OTHERFILE.CSV"]

lf = (
    pl.concat(
        [
            pl.scan_csv(
                csv_path,  # must be unzipped beforehand
                skip_rows=1,  # skip the header
                infer_schema=False,  # much faster
            )
            .filter(cs.by_index(0) == "D")  # drop the footer
            .select(~cs.by_index(range(4)))  # drop metadata columns
            for csv_path in csv_paths
        ],
        how="diagonal_relaxed",
    )
    .with_columns(
        pl.col("SETTLEMENTDATE", "LASTCHANGED").str.strptime(pl.Datetime, dt_s_fmt),
        pl.col("OFFERSETTLEMENTDATE").str.strptime(pl.Date, d_fmt),
        pl.col("OFFEREFFECTIVEDATE").str.strptime(pl.Datetime, dt_ms_fmt),
    )
    .cast(
        {
            "LINKID": str,
            "PARTICIPANTID": pl.Categorical,
            "RUNNO": pl.Enum(["1"]),
            "OFFERSETTLEMENTDATE": pl.Date(),
            "OFFERVERSIONNO": int,  # or pl.Int16
        }
    )
    # Drop deprecated/unused columns
    .drop("RUNNO")
    # Deduplicate
    # We want one row per ['LINKID', 'PARTICIPANTID', 'RUNNO', 'SETTLEMENTDATE']
    # Tie-breaker: greatest value of ['LASTCHANGED']
    .sort(["LASTCHANGED"], descending=False)
    .unique(subset=["LINKID", "PARTICIPANTID", "RUNNO", "SETTLEMENTDATE"], keep="last")
)

Nemosis

This table is not yet available in Nemosis.

Example File

From PUBLIC_ARCHIVE_DISPATCH_MNSPBIDTRK_FILE01_202606010000.zip

Table without MetadataTable with MetadataRaw Text without Metadata

SETTLEMENTDATE	RUNNO	PARTICIPANTID	LINKID	OFFERSETTLEMENTDATE	OFFEREFFECTIVEDATE	OFFERVERSIONNO	LASTCHANGED
2026/06/01 00:05:00	1	BASSLINK	BLNKTAS	2026/05/31 00:00:00	2026/05/31 23:56:05.000	1	2026/06/01 00:00:03
2026/06/01 00:05:00	1	BASSLINK	BLNKVIC	2026/05/31 00:00:00	2026/05/31 23:56:05.000	1	2026/06/01 00:00:03
2026/06/01 00:10:00	1	BASSLINK	BLNKTAS	2026/05/31 00:00:00	2026/06/01 00:01:07.000	1	2026/06/01 00:05:01
2026/06/01 00:10:00	1	BASSLINK	BLNKVIC	2026/05/31 00:00:00	2026/06/01 00:01:07.000	1	2026/06/01 00:05:01
2026/06/01 00:15:00	1	BASSLINK	BLNKTAS	2026/05/31 00:00:00	2026/06/01 00:06:05.000	1	2026/06/01 00:10:03
2026/06/01 00:15:00	1	BASSLINK	BLNKVIC	2026/05/31 00:00:00	2026/06/01 00:06:05.000	1	2026/06/01 00:10:03
2026/06/01 00:20:00	1	BASSLINK	BLNKTAS	2026/05/31 00:00:00	2026/06/01 00:11:05.000	1	2026/06/01 00:15:02
2026/06/01 00:20:00	1	BASSLINK	BLNKVIC	2026/05/31 00:00:00	2026/06/01 00:11:05.000	1	2026/06/01 00:15:02
2026/06/01 00:25:00	1	BASSLINK	BLNKTAS	2026/05/31 00:00:00	2026/06/01 00:16:05.000	1	2026/06/01 00:20:02
2026/06/01 00:25:00	1	BASSLINK	BLNKVIC	2026/05/31 00:00:00	2026/06/01 00:16:05.000	1	2026/06/01 00:20:02
2026/06/01 00:30:00	1	BASSLINK	BLNKTAS	2026/05/31 00:00:00	2026/06/01 00:21:04.000	1	2026/06/01 00:25:03
...

C	SETP.WORLD	DVD_DISPATCH_MNSPBIDTRK	AEMO	PUBLIC	2026/07/08	17:59:18	001783497558971	MONTHLY_ARCHIVE	001783497558971
I	DISPATCH	MNSPBIDTRK	1	SETTLEMENTDATE	RUNNO	PARTICIPANTID	LINKID	OFFERSETTLEMENTDATE	OFFEREFFECTIVEDATE	OFFERVERSIONNO	LASTCHANGED
D	DISPATCH	MNSPBIDTRK	1	2026/06/01 00:05:00	1	BASSLINK	BLNKTAS	2026/05/31 00:00:00	2026/05/31 23:56:05.000	1	2026/06/01 00:00:03
D	DISPATCH	MNSPBIDTRK	1	2026/06/01 00:05:00	1	BASSLINK	BLNKVIC	2026/05/31 00:00:00	2026/05/31 23:56:05.000	1	2026/06/01 00:00:03
D	DISPATCH	MNSPBIDTRK	1	2026/06/01 00:10:00	1	BASSLINK	BLNKTAS	2026/05/31 00:00:00	2026/06/01 00:01:07.000	1	2026/06/01 00:05:01
D	DISPATCH	MNSPBIDTRK	1	2026/06/01 00:10:00	1	BASSLINK	BLNKVIC	2026/05/31 00:00:00	2026/06/01 00:01:07.000	1	2026/06/01 00:05:01
D	DISPATCH	MNSPBIDTRK	1	2026/06/01 00:15:00	1	BASSLINK	BLNKTAS	2026/05/31 00:00:00	2026/06/01 00:06:05.000	1	2026/06/01 00:10:03
D	DISPATCH	MNSPBIDTRK	1	2026/06/01 00:15:00	1	BASSLINK	BLNKVIC	2026/05/31 00:00:00	2026/06/01 00:06:05.000	1	2026/06/01 00:10:03
D	DISPATCH	MNSPBIDTRK	1	2026/06/01 00:20:00	1	BASSLINK	BLNKTAS	2026/05/31 00:00:00	2026/06/01 00:11:05.000	1	2026/06/01 00:15:02
D	DISPATCH	MNSPBIDTRK	1	2026/06/01 00:20:00	1	BASSLINK	BLNKVIC	2026/05/31 00:00:00	2026/06/01 00:11:05.000	1	2026/06/01 00:15:02
D	DISPATCH	MNSPBIDTRK	1	2026/06/01 00:25:00	1	BASSLINK	BLNKTAS	2026/05/31 00:00:00	2026/06/01 00:16:05.000	1	2026/06/01 00:20:02
D	DISPATCH	MNSPBIDTRK	1	2026/06/01 00:25:00	1	BASSLINK	BLNKVIC	2026/05/31 00:00:00	2026/06/01 00:16:05.000	1	2026/06/01 00:20:02
D	DISPATCH	MNSPBIDTRK	1	2026/06/01 00:30:00	1	BASSLINK	BLNKTAS	2026/05/31 00:00:00	2026/06/01 00:21:04.000	1	2026/06/01 00:25:03
...
C	END OF REPORT	1003

SETTLEMENTDATE,RUNNO,PARTICIPANTID,LINKID,OFFERSETTLEMENTDATE,OFFEREFFECTIVEDATE,OFFERVERSIONNO,LASTCHANGED
"2026/06/01 00:05:00",1,BASSLINK,BLNKTAS,"2026/05/31 00:00:00","2026/05/31 23:56:05.000",1,"2026/06/01 00:00:03"
"2026/06/01 00:05:00",1,BASSLINK,BLNKVIC,"2026/05/31 00:00:00","2026/05/31 23:56:05.000",1,"2026/06/01 00:00:03"
"2026/06/01 00:10:00",1,BASSLINK,BLNKTAS,"2026/05/31 00:00:00","2026/06/01 00:01:07.000",1,"2026/06/01 00:05:01"
"2026/06/01 00:10:00",1,BASSLINK,BLNKVIC,"2026/05/31 00:00:00","2026/06/01 00:01:07.000",1,"2026/06/01 00:05:01"
"2026/06/01 00:15:00",1,BASSLINK,BLNKTAS,"2026/05/31 00:00:00","2026/06/01 00:06:05.000",1,"2026/06/01 00:10:03"
"2026/06/01 00:15:00",1,BASSLINK,BLNKVIC,"2026/05/31 00:00:00","2026/06/01 00:06:05.000",1,"2026/06/01 00:10:03"
"2026/06/01 00:20:00",1,BASSLINK,BLNKTAS,"2026/05/31 00:00:00","2026/06/01 00:11:05.000",1,"2026/06/01 00:15:02"
"2026/06/01 00:20:00",1,BASSLINK,BLNKVIC,"2026/05/31 00:00:00","2026/06/01 00:11:05.000",1,"2026/06/01 00:15:02"
"2026/06/01 00:25:00",1,BASSLINK,BLNKTAS,"2026/05/31 00:00:00","2026/06/01 00:16:05.000",1,"2026/06/01 00:20:02"
"2026/06/01 00:25:00",1,BASSLINK,BLNKVIC,"2026/05/31 00:00:00","2026/06/01 00:16:05.000",1,"2026/06/01 00:20:02"
"2026/06/01 00:30:00",1,BASSLINK,BLNKTAS,"2026/05/31 00:00:00","2026/06/01 00:21:04.000",1,"2026/06/01 00:25:03"
...

Raw Text with Metadata

C,SETP.WORLD,DVD_DISPATCH_MNSPBIDTRK,AEMO,PUBLIC,2026/07/08,17:59:18,001783497558971,MONTHLY_ARCHIVE,001783497558971
I,DISPATCH,MNSPBIDTRK,1,SETTLEMENTDATE,RUNNO,PARTICIPANTID,LINKID,OFFERSETTLEMENTDATE,OFFEREFFECTIVEDATE,OFFERVERSIONNO,LASTCHANGED
D,DISPATCH,MNSPBIDTRK,1,"2026/06/01 00:05:00",1,BASSLINK,BLNKTAS,"2026/05/31 00:00:00","2026/05/31 23:56:05.000",1,"2026/06/01 00:00:03"
D,DISPATCH,MNSPBIDTRK,1,"2026/06/01 00:05:00",1,BASSLINK,BLNKVIC,"2026/05/31 00:00:00","2026/05/31 23:56:05.000",1,"2026/06/01 00:00:03"
D,DISPATCH,MNSPBIDTRK,1,"2026/06/01 00:10:00",1,BASSLINK,BLNKTAS,"2026/05/31 00:00:00","2026/06/01 00:01:07.000",1,"2026/06/01 00:05:01"
D,DISPATCH,MNSPBIDTRK,1,"2026/06/01 00:10:00",1,BASSLINK,BLNKVIC,"2026/05/31 00:00:00","2026/06/01 00:01:07.000",1,"2026/06/01 00:05:01"
D,DISPATCH,MNSPBIDTRK,1,"2026/06/01 00:15:00",1,BASSLINK,BLNKTAS,"2026/05/31 00:00:00","2026/06/01 00:06:05.000",1,"2026/06/01 00:10:03"
D,DISPATCH,MNSPBIDTRK,1,"2026/06/01 00:15:00",1,BASSLINK,BLNKVIC,"2026/05/31 00:00:00","2026/06/01 00:06:05.000",1,"2026/06/01 00:10:03"
D,DISPATCH,MNSPBIDTRK,1,"2026/06/01 00:20:00",1,BASSLINK,BLNKTAS,"2026/05/31 00:00:00","2026/06/01 00:11:05.000",1,"2026/06/01 00:15:02"
D,DISPATCH,MNSPBIDTRK,1,"2026/06/01 00:20:00",1,BASSLINK,BLNKVIC,"2026/05/31 00:00:00","2026/06/01 00:11:05.000",1,"2026/06/01 00:15:02"
D,DISPATCH,MNSPBIDTRK,1,"2026/06/01 00:25:00",1,BASSLINK,BLNKTAS,"2026/05/31 00:00:00","2026/06/01 00:16:05.000",1,"2026/06/01 00:20:02"
D,DISPATCH,MNSPBIDTRK,1,"2026/06/01 00:25:00",1,BASSLINK,BLNKVIC,"2026/05/31 00:00:00","2026/06/01 00:16:05.000",1,"2026/06/01 00:20:02"
D,DISPATCH,MNSPBIDTRK,1,"2026/06/01 00:30:00",1,BASSLINK,BLNKTAS,"2026/05/31 00:00:00","2026/06/01 00:21:04.000",1,"2026/06/01 00:25:03"
...
C,"END OF REPORT",1003

Availability

Visibility: Private & Public Next-Day

This table is in the public monthly MMSDM archive.

I have collated the list of all those files into one place, in this CSV metadata file. (Columns year, month, url, compressed_size in bytes).

The earliest available data is month 1 of 2015. The most recent available data is month 6 of 2026.

Every month in between has a file. (No gaps.)

Data Size

Each year of data is approximately 2 MB when zipped, 15 MB as unzipped CSV.

Deduplication and PDR Loader Configuration

The primary keys are:

LINKID
PARTICIPANTID
RUNNO
SETTLEMENTDATE

The transaction type is "insert", which means that you will usually not see duplicate data. If you do, you can deduplicate based on the primary keys, without sorting first. Rows from different files with the same primary keys should have the same values.

PDR Loader configuration is:

Report Name	Report Subtype	Version
DISPATCH	MNSPBIDTRK	1

This means that the CSV files start with metadata columns:

I,DISPATCH,MNSPBIDTRK,1,...
D,DISPATCH,MNSPBIDTRK,1,...

Indexes

LASTCHANGED

Links

This page as JSON (schema documented here, but may change)

Download a JSON Schema specification for this table.

Official AEMO schema documentation

Other Information

Package: DISPATCH