<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-12 -285 02:00:00.000"
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 2 0 0 0 0 0 0 0 44 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Severe F-spread, F2o cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.12 (285) 02:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" 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">
FF202628510120200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.078" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.240" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="312.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="312.500" 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="1.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="380.389" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="336.237" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="297.065" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.439" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="56.954" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.057" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.416" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="56.590" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.030" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="20">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
312.500 333.125 353.750 374.375 395.000 400.000 380.000 360.000 361.103 362.400 363.948 365.828 368.159 371.125 375.026 380.389 388.224 400.753 423.994 481.952
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 57 0 54 51 0 60 0 60 0 0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 0.390625 -1.953125 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -1.171875 1.953125 0.390625 -0.390625 -0.390625 1.953125 1.953125 1.953125 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="128">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.509 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 185.019 190.0 195.0 200.0 205.0 210.0 215.0 220.0 222.528 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 336.237 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.334 0.318 0.296 0.266 0.226 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.22 0.241 0.262 0.282 0.303 0.323 0.344 0.354 0.402 0.513 0.645 0.803 0.989 1.205 1.453 1.732 2.039 2.372 2.727 3.099 3.483 3.873 4.261 4.64 5.001 5.334 5.63 5.878 6.068 6.193 6.248 6.25 6.24 6.199 6.13 6.035 5.92 5.787 5.64 5.481 5.314 5.14 4.962 4.782 4.601 4.42 4.24 4.064 3.89 3.72 3.555 3.394 3.239 3.088 2.943 2.803 2.669 2.54 2.417 2.298 2.185 2.077 1.974 1.875 1.781 1.692 1.607 1.525 1.448 1.375 1.305 1.238 1.175 1.115 1.058 1.004 0.952 0.903 0.857 0.813 0.771 0.731 0.694 0.658 0.624 0.592 0.561 0.532 0.505 0.479 0.454 0.431 0.409 0.387 0.367 0.348 0.33 0.313 0.297 0.282 0.267 0.253 0.24 0.228 0.216 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="6.25" PeakHeight="336.237" Num="5" zHalfNm="297.065" Error="2.273">
-113.238 -1.092 0.943 -0.528 0.206
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="112.528" Depth="0.154"/>
<TopsideChapman PeakHeight="336.237" PeakDensity="484646.4" PeakScaleHeight="29.416" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
