Index: /trunk/doc/design/notes.txt
===================================================================
--- /trunk/doc/design/notes.txt	(revision 2170)
+++ /trunk/doc/design/notes.txt	(revision 2170)
@@ -0,0 +1,70 @@
+
+- Add PS-1 discussion in Subsystem Overview: 
+
+  In the case of the IPP, PS-1 differs from the complete PS-4 system
+  in several important ways.  First, with only one telescope and
+  camera, the data throughput rate is substantially reduce to a
+  maximum of 1 64-OTA image per 40 seconds rather than 4.  In
+  addition, much of the PS-1 mission will be devoted to calibration
+  and testing which will imply a different level of processing.  For a
+  significant fraction of PS-1, data will be obtained for the AP
+  Survey covering the entire $3\pi$ steradians of the sky accessible
+  to PS-4.  These images will not be analysed initially to the
+  complete analysis level of having multiple images combined.  Rather,
+  it will be calibrated to the extent possible for a single focal
+  plane array.  Only after the AP Survey is done, the analysis process
+  has been validated, and the complete AP Survey reference catalog has
+  been generated will it be possible to generate the first epoch
+  static sky image, rougly 18 months into the PS-1 mission.
+
+- fix order in 3.2 (MD before AP DB)
+- Add PS-1 discussion to hardware: only 64 OTAs per image
+
+- AD DB Operations:
+  - Addstar:
+
+    This operation takes the metadata and object data for an image
+    (complete FPA or individual OTA?) and inserts the data into the AP
+    Database.  This operation is performed by a client in interaction
+    with the AP Database Servers.  The steps performed are as follows:
+
+    Client-side data distribution
+    - load relevant Region table rows
+    - divide object list into appropriate regions
+    - identify appropriate image table
+    - send object data to appropriate servers
+    - send image data to appropriate server
+
+    Server side interactions
+    - accept detections for specific object table 
+    - load corresponding objects
+    - load corresponding detections 
+    - spatially match detections to objects
+    - add matched detections to detection table (with object IDs)
+    - update object average parameters
+
+  - Delstar
+
+  - Relphot
+
+
+- Scheduler
+
+  Get new images
+  every 15 seconds
+
+    check for newest current image in metadata db
+    request images newer than T
+
+
+      status
+      /path/image.fits
+      /path/metadata.fits
+
+    add entry to metadata DB
+    save metadata to MD DB
+    copy image to image server
+    set metadata entry to downloaded
+
+      
+