1. Oberpfaffenhofen, Germany
USGS/EROS
Archive Preservation
Status
Update
Stuart Doescher, USGS
(Cheryl Greenhagen)
WGISS – 24
October 15-19, 2007
Oberpfaffenhofen, Germany

2. TM and MSS Archive Conversion System (TMACS)
Operations: to 2002.
Number of High Density Tapes (HDT) transcribed: 55,503
Landsat MSS, TM
Number of DCRSi Cassette Tapes (DCT)s output: 3,827
Mostly in Telemetry stream format
(Frame sync required to read)

3. WBVT summary Operated: April 1999 - May 2002
Number of HDTs converted: 21,300
Number of Digital Linear Tape (DLT 7000) generated: and an additional 143 as backup
Format: BSQ ( MSS-X)
"orphan" data (no DIAT / SLAT) save on 172 DLTs
Bad input tapes: (even with cleaning & baking).

4. SPOT summary Operated: late April 2000 - February 2002
Number of HDTs converted: 6,100
Number of DLT 7000 tapes generated: 901
Format: MDA's FRED

5. Landsat Archive Conversion System (LACS)
Planned Operations: June 2004 – December 2006
Input: About 5600 HDTs, 4000 DCTs,
plus current Landsat 5 data
Output: ~ 1200 tapes of "formatted" data
and ~ 1350 tapes of "raw" data
on 9940B. (~180G/tape)
Format: BSQ

6. LACS Description Ingest current Landsat 5 data from disk files
Ingest data from DCRSi Cassette Tapes (DCTs)
Multispectral Scanner Archive format (MSS-A) data
Multispectral Scanner Product format (MSS-P) data
Thematic Mapper Archive format (TM-A) data
Thematic Mapper raw (TM-R) data
Ingest TM-R data from High Density Tapes (HDTs)
Archive the data to a high-density computer-compatible digital tape: 9940B
Generate and archive browse imagery
Generate inventory information for the new archive.

7. Data to be converted by LACS
Data Set
Number of Scenes
Number of Tapes
Data Volume
MSS-P
65,000
118 DCTs
3.2 terabytes
MSS-A
262,000
277 DCTs
9.5 terabytes
TM-A
17,000
108 DCTs
3.6 terabytes
TM-R (1982 – 2005)
550,000
3,320 DCTs
140 terabytes
TM-R (1995 – 2002)
110,000
5,600 HDTs
28.0 terabytes
TM-R (new)
128,000
~ 32 terabytes
 1,132,000
 Total
~216 terabytes
The number on the slides for "new" L5 TMR data, received at EDC, GLC, or Australia,
also includes some of the reprocessing done at EROS.
We keep track of EDC, GLC, and Australia separately,
but we use the same system for reprocessing data from disk files.
The numbers I gave you include some of the reprocessing we have done on that system.

8. LACS Status Started Operations: June 2004
Progress to Date: (August 31, 2007)
Routine transcription completed December 2006
Data anomalies and problem tapes still being worked, on a part-time basis
MSS-P, MSS-A not started, MSS-A to start in July and then MSS-P.
TM-A done and about 70 problem DCT’s (media or meta data) to handle (about ½ need ot go back to HDTs)
Original time line was 5 years, but system efficiencies targeted 2 years. Problems left (80-20)

9. LACS Configuration

10. LACS Status LTS (LACS Transcription Subsystem)
LTS work is performed by two strings
LTS 1 Transcribes Landsat data from DCT,
and Current Landsat 5 data
(acquired at EDC or GLC, or received on DLT from Australia)
LTS3 Transcribes Landsat data from HDT or DCT
LTS2 and LTS4 have been retired

11. LACS Status LIS (LACS Integration Subsystem)
Performs Automated Cloud Cover Assessment,
Browse Generation, Quality Assignment
Provides Interactive Assessment Capability
Gives priority to current Landsat 5 data
LIS work is distributed across 2 strings
LIS3 has been retired

12. LACS Status Issues / Problems: Plans:
Data anomalies, tape degradation, cross-play issues
DCRSi and HDTR tape drives require frequent cleaning and maintenance
Plans:
Complete work on anomalous data and problem tapes