<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-23 -054 00:50:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 8 0 0 0 0 0 0 0 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44: Problems inverting F-trace to N(h)-profile</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.02.23 (054) 00:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202605402230050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="17" >
<URSI ID="00" Val="6.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.811" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.835" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="453.876" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.335" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="85">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 280.000 280.000 280.000 280.000 280.000 281.667 283.333 285.000 290.000 295.000 295.000 280.000 282.500 285.000 290.000 300.000 305.000 310.000 315.833 321.667 327.500 333.333 339.167 345.000 346.667 348.333 350.000 355.000 358.333 361.667 365.000 365.000 365.000 365.000 370.000 375.000 370.000 375.000 376.714 378.429 380.143 381.857 383.571 385.286 387.000 388.714 390.429 392.143 393.857 395.571 397.286 399.000 400.714 402.429 404.143 405.857 407.571 409.286 411.000 412.714 414.429 416.143 417.857 419.571 421.286 423.000 424.714 426.429 428.143 429.857 431.571 433.286 435.000 436.667 438.333 440.000 442.500 445.000 445.000 446.629 449.202 453.876 465.000 525.619
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 66 63 0 0 60 0 0 60 63 63 63 51 0 0 54 54 0 60 66 57 0 57 0 54 0 0 48 51 0 0 57 57 63 63 57 57 57 57 0 0 0 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 0 0 0 57 0 0 0 0 0 0 57 0 57 57 0 63 54 57 0 51 60 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 0.390625 0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.171875 1.171875 -1.171875 1.953125 1.171875 -1.953125 -1.953125 -1.171875 0.390625 -1.171875 -1.953125 0.390625 0.390625 0.390625 1.953125 1.953125 -1.171875 1.171875 -0.390625 0.390625 1.171875 0.390625 1.953125 1.171875 -2.734375 -1.953125 0.390625 0.390625 0.390625 -1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 1.171875 0.390625
</TraceValueList>
</Trace>
</TraceList>
</SAORecord>
</SAORecordList>
