Lists of Magnetic Conjunction between FIREBIRD-II and RBSP missions

Magnetic conjunctions between RBSP and FIREBIRD-II satellites The archived csv files contain conjunctions between each FIREBIRD-II CubeSat (FU3, FU4) and RBSP satellite (RBSPA, RBSPB). Conjunction definition We used the T89 magnetic field model with real-time kp to calculate the `startTime` and `endTime` during which the each satellite pair was within `dL` and `dMLT` of each other (in conjunction). We generated files with two sets of `dL` and `dMLT`: 0.5 and 1---both are annotated in the filename by `dLXY` and `dMLTXY`. For example, the `FU3_RBSPA_conjunctions_dL05_dMLT05_final.csv` file contains conjunctions between FU3 and RBSPA defined by `dL < 0.5` and `dMLT < 0.5`. We targeted outer radiation belt conjunctions, and set a minimum L shell of a conjunction to 3. Data availability Given its sparse availability, we only calculated conjunctions when FIREBIRD-II was taking `Context` and `HiRes` data. The `hr` filename suffix contains only conjunctions with `HiRes` data, and filename with no such suffix contain conjunctions during all FIREBIRD campaign s where it took `Context` data. File contents 1. `startTime` - The first time when dL and dMLT were within the conjunction threshold. 2. `endTime` - The last time when dL and dMLT were within the conjunction threshold. 3. `meanL` - The mean L-shell of the conjunction. 4. `meanMLT` - The mean MLT of the conjunction. This and meanL columns give you a sense of where the conjunction occured. 5. `minMLT` - The minimum MLT separation between FIREBIRD and RBSP. The L-shells intersect in each conjunction (minimum `dL=0`), so `minMLT` represents the `dMLT` at that time. 6. `minD [km]` - An experimental value representing the minimum footprint separation at 500 km, in units of km. Both spacecraft were mapped to both hemispheres and the minimum of the two hemispheres taken.RBSP与FIREBIRD-II卫星的磁共轭事件数据集 归档的CSV文件包含每颗FIREBIRD-II立方体卫星（CubeSat，FU3、FU4）与RBSP卫星（RBSPA、RBSPB）之间的磁共轭事件记录。 共轭事件定义 本次研究采用结合实时kp地磁指数的T89磁场模型，计算每对卫星处于磁共轭状态的时间区间`startTime`与`endTime`，此时卫星对的dL与dMLT满足共轭阈值条件。我们生成了两组阈值参数的共轭事件文件，dL与dMLT的阈值分别为0.5和1，文件名中以`dLXY`与`dMLTXY`标注对应的阈值。例如，`FU3_RBSPA_conjunctions_dL05_dMLT05_final.csv`文件包含以`dL < 0.5`且`dMLT < 0.5`为阈值定义的FU3与RBSPA之间的共轭事件。本次研究聚焦外辐射带共轭事件，将共轭事件的最小L壳层（L-shell）阈值设为3。 数据可用性说明 鉴于FIREBIRD-II的观测数据较为稀疏，仅当该卫星采集`Context`与`HiRes`数据时，才会计算共轭事件。文件名后缀`hr`代表仅包含带有`HiRes`数据的共轭事件；未带该后缀的文件，则涵盖FIREBIRD-II所有开展`Context`数据采集任务期间的共轭事件。 文件字段说明 1. `startTime`：卫星对首次满足共轭阈值条件的时刻； 2. `endTime`：卫星对最后一次满足共轭阈值条件的时刻； 3. `meanL`：共轭事件期间的平均L壳层值； 4. `meanMLT`：共轭事件期间的平均磁地方时（Magnetic Local Time，MLT）值，结合`meanL`可确定共轭事件发生的空间位置； 5. `minMLT`：FIREBIRD与RBSP之间的最小磁地方时差。由于每一次共轭事件中，两侧卫星的L壳层会相交（此时最小dL=0），因此`minMLT`即代表该时刻的dMLT值； 6. `minD [km]`：实验性参数，代表500km高度处的最小足迹间距，单位为千米。计算时将两颗航天器的足迹映射至南北两个半球，并取二者的最小间距值。