CcsdsOrbitEphemerisMessageFile Class |
Reads from and writes to Orbit Ephemeris Message (OEM) files determined by the specifications of The Consultative Committee for Space Data Systems (CCSDS). CCSDS OEM files can express position, velocity, acceleration, and covariance information.
The CCSDS specifications can be found on the CCSDS website. The two supported formats for OEM files are Key-value notation (KVN) and extensible markup language (XML). The official recommended standards for KVN OEM files can be found in "Orbit Data Messages", Document CCSDS 502.0-B-2 on the above website. The official recommended standards for XML OEM files can be found in "XML Specifications for Navigation Data Messages", Document CCSDS 505.0-B-2 on the website. Both documents also contain a few useful examples of correctly formatted OEM files for their respective formats.
Each OEM file can contain several segments of ephemeris data, so this class mostly serves as a container for CcsdsOrbitEphemerisMessageSegment objects and as an interface for reading and writing those objects. The actual ephemeris and covariance data is stored in the segments.
Inheritance HierarchySystem.Collections.ObjectModelCollectionCcsdsOrbitEphemerisMessageSegment
AGI.Foundation.InfrastructureDefinitionalObjectCollectionCcsdsOrbitEphemerisMessageSegment
AGI.Foundation.CcsdsCcsdsOrbitEphemerisMessageFile
Namespace: AGI.Foundation.Ccsds
Assembly: AGI.Foundation.Models (in AGI.Foundation.Models.dll) Version: 24.2.419.0 (24.2.419.0)
SyntaxThe CcsdsOrbitEphemerisMessageFile type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | CcsdsOrbitEphemerisMessageFile | Initializes a new instance. |
 | CcsdsOrbitEphemerisMessageFile(CcsdsOrbitEphemerisMessageFile, CopyContext) | Initializes a new instance as a copy of an existing instance. |
Properties| Name | Description | |
|---|---|---|
 | Comments |
Gets a collection containing comments from the header of a CCSDS OEM file.
|
| Count | Gets the number of elements actually contained in the CollectionT. (Inherited from CollectionCcsdsOrbitEphemerisMessageSegment.) |
| CreationDate |
Gets or sets the file creation date and time in UTC.
|
| IsFrozen |
Gets a value indicating whether this object is frozen. A frozen object cannot be modified and an
ObjectFrozenException will be thrown if an attempt is made to do so.
(Inherited from DefinitionalObjectCollectionT.) |
| Item | Gets or sets the element at the specified index. (Inherited from CollectionCcsdsOrbitEphemerisMessageSegment.) |
 | Items | Gets a IListT wrapper around the CollectionT. (Inherited from CollectionCcsdsOrbitEphemerisMessageSegment.) |
| Originator |
Gets or sets the creating agency or operator. The country
of origin should also be provided where the originator
is not a national space agency.
|
| Version |
Gets or sets the ephemeris file version.
|
Methods| Name | Description | |
|---|---|---|
| Add | Adds an object to the end of the CollectionT. (Inherited from CollectionCcsdsOrbitEphemerisMessageSegment.) |
| AddRange |
Adds the elements of the specified collection to the end of the DefinitionalObjectCollectionT.
(Inherited from DefinitionalObjectCollectionT.) |
| CheckForSameDefinition(CcsdsOrbitEphemerisMessageFile) |
Checks to determine if another instance has the same definition as this instance and
returns if it does. Derived classes MUST override this method and check
all new fields introduced by the derived class for definitional equivalence. It is NOT necessary
to check base class fields because the base class will already have done that. When overriding this method,
you should NOT call the base implementation because it will return for all derived-class instances.
Derived classes should check the type of other to preserve the symmetric nature of IsSameDefinition(Object).
|
| CheckForSameDefinition(DefinitionalObjectCollectionCcsdsOrbitEphemerisMessageSegment) |
Checks to determine if another instance has the same definition as this instance and
returns if it does. Derived classes MUST override this method and check
all new fields introduced by the derived class for definitional equivalence. It is NOT necessary
to check base class fields because the base class will already have done that. When overriding this method,
you should NOT call the base implementation because it will return for all derived-class instances.
Derived classes should check the type of other to preserve the symmetric nature of IsSameDefinition(Object).
(Overrides DefinitionalObjectCollectionTCheckForSameDefinition(DefinitionalObjectCollectionT).) |
| Clear | Removes all elements from the CollectionT. (Inherited from CollectionCcsdsOrbitEphemerisMessageSegment.) |
| ClearItems |
Removes all elements from the DefinitionalObjectCollectionT (Inherited from DefinitionalObjectCollectionT.) |
| Clone |
Clones this object using the specified context.
(Overrides DefinitionalObjectCollectionTClone(CopyContext).) |
| ComputeCurrentDefinitionHashCode |
Computes a hash code based on the current properties of this object. Derived classes MUST override this
method and compute a hash code that combines: a unique hash code seed, the base implementation result, and
the hash codes of all new fields introduced by the derived class which are used in the
CheckForSameDefinition(DefinitionalObjectCollectionT) method.
(Overrides DefinitionalObjectCollectionTComputeCurrentDefinitionHashCode.) |
| Contains | Determines whether an element is in the CollectionT. (Inherited from CollectionCcsdsOrbitEphemerisMessageSegment.) |
| CopyTo | Copies the entire CollectionT to a compatible one-dimensional Array, starting at the specified index of the target array. (Inherited from CollectionCcsdsOrbitEphemerisMessageSegment.) |
| EnumerateDependencies |
Enumerates the dependencies of this object by calling
EnumerateT(T) for each object that this object directly depends upon.
Derived classes which contain additional dependencies MUST override this method, call the base
implementation, and enumerate dependencies introduced by the derived class.
(Inherited from DefinitionalObjectCollectionT.) |
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
| Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| Freeze |
Freezes this object. Further attempts to modify it will result
in an ObjectFrozenException.
(Inherited from DefinitionalObjectCollectionT.) |
| FreezeAggregatedObjects |
Called by Freeze to also freeze any objects that are considered to be a part of this object.
Derived classes which contain additional aggregated objects MUST override this method, call the base
implementation, and freeze aggregated objects introduced by the derived class. The objects that need to be
frozen in this method are frequently created in this object's constructor and are not settable via
properties.
(Inherited from DefinitionalObjectCollectionT.) |
| GetDefinitionHashCode |
Gets a hash code representing the definition of this object.
(Inherited from DefinitionalObjectCollectionT.) |
| GetEnumerator | Returns an enumerator that iterates through the CollectionT. (Inherited from CollectionCcsdsOrbitEphemerisMessageSegment.) |
| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| IndexOf | Searches for the specified object and returns the zero-based index of the first occurrence within the entire CollectionT. (Inherited from CollectionCcsdsOrbitEphemerisMessageSegment.) |
| Insert | Inserts an element into the CollectionT at the specified index. (Inherited from CollectionCcsdsOrbitEphemerisMessageSegment.) |
| InsertItem |
Inserts an element into the DefinitionalObjectCollectionT at the specified index.
(Inherited from DefinitionalObjectCollectionT.) |
| IsSameDefinition |
Determines if this object has the same definition as another object.
(Inherited from DefinitionalObjectCollectionT.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
 | ReadFrom(String) |
Reads the CCSDS OEM file. If it can be parsed as a valid XML document, it will be.
Otherwise, it will be parsed as a key-value notation (KVN) OEM file.
|
| ReadFrom(TextReader) |
Reads the CCSDS OEM file. If it has a valid XML header, it will be
parsed as an XML OEM file. Otherwise, it will be parsed as a
key-value notation (KVN) OEM file.
|
| Remove | Removes the first occurrence of a specific object from the CollectionT. (Inherited from CollectionCcsdsOrbitEphemerisMessageSegment.) |
| RemoveAt | Removes the element at the specified index of the CollectionT. (Inherited from CollectionCcsdsOrbitEphemerisMessageSegment.) |
| RemoveItem |
Removes the element at the specified index of the DefinitionalObjectCollectionT.
(Inherited from DefinitionalObjectCollectionT.) |
| SetItem |
Replaces the element at the specified index.
(Inherited from DefinitionalObjectCollectionT.) |
| ThrowIfFrozen |
Throws ObjectFrozenException if this object IsFrozen.
This method should be called from any method or property that modifies this object.
(Inherited from DefinitionalObjectCollectionT.) |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
| WriteTo(TextWriter) | Writes this instance to a TextWriter in the CCSDS orbit ephemeris message OEM format. This overload uses the DefaultOptions of the CcsdsOemFileWritingOptions, which means that the CreationDate is overridden by the current date and time and that the OEM will be written in the Key-Value Notation (KVN) format. The TextWriter can be a StreamWriter for writing to a file, a StringWriter for writing to a string, or any number of other types. If acceleration information is contained in the EphemerisData of any of the segments contained by this instance, or if the CovarianceData of any of the segments is not empty, then the Version needs to be set to 2.0 or this method will throw. |
| WriteTo(TextWriter, CcsdsOemFileWritingOptions) | Writes this instance to a TextWriter in the CCSDS orbit ephemeris message OEM format. The TextWriter can be a StreamWriter for writing to a file, a StringWriter for writing to a string, or any number of other types. If acceleration information is contained in the EphemerisData of any of the segments contained by this instance, or if the CovarianceData of any of the segments is not empty, then the Version needs to be set to 2.0 or this method will throw. |
See Also