<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-13 -286 21:50:00.000"
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="15.0">
<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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.10.13 (286) 21:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202628610132150009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.631" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="14.996" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="490.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="490.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="438.218" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="379.636" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.626" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="88.698" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.598" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="41.648" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="103.730" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="29">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
560.000 555.000 553.333 551.667 550.000 547.500 545.000 542.500 540.000 535.000 530.000 530.000 529.375 528.750 528.125 527.500 526.875 526.250 525.625 525.000 525.000 525.000 490.000 490.000 490.000 510.000 527.500 545.000 589.437
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 51 0 0 63 0 54 63 57 57 66 63 0 0 60 54 57 60 54 66 66 0 66 63 66 54 63 51 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.171875 -1.171875 -1.171875 -2.734375 -2.734375 -1.953125 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="177">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.118 145.0 150.0 155.0 160.0 165.0 170.0 172.237 175.0 180.0 185.0 190.0 195.0 200.0 203.355 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 438.218 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.341 0.325 0.3 0.265 0.214 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.214 0.238 0.263 0.288 0.313 0.337 0.354 0.378 0.435 0.487 0.539 0.594 0.653 0.717 0.787 0.864 0.949 1.041 1.14 1.246 1.357 1.472 1.59 1.709 1.829 1.95 2.07 2.19 2.311 2.431 2.551 2.671 2.791 2.912 3.033 3.154 3.277 3.4 3.525 3.651 3.779 3.908 4.04 4.175 4.312 4.452 4.596 4.745 4.898 5.056 5.218 5.384 5.545 5.671 5.7 5.699 5.686 5.658 5.617 5.565 5.501 5.428 5.347 5.259 5.164 5.063 4.959 4.85 4.739 4.626 4.51 4.394 4.277 4.161 4.044 3.928 3.813 3.7 3.588 3.477 3.369 3.262 3.158 3.056 2.956 2.859 2.764 2.671 2.581 2.493 2.408 2.325 2.245 2.167 2.091 2.018 1.947 1.879 1.812 1.748 1.686 1.626 1.568 1.511 1.457 1.405 1.354 1.305 1.258 1.213 1.169 1.126 1.085 1.046 1.008 0.971 0.936 0.902 0.869 0.837 0.806 0.777 0.748 0.721 0.695 0.669 0.645 0.621 0.598 0.576 0.555 0.535 0.515 0.496 0.478 0.46 0.444 0.427 0.412 0.396 0.382 0.368 0.354 0.341 0.329 0.317 0.305 0.294 0.283 0.273 0.263 0.253 0.244 0.235 0.226 0.218 0.21 0.202

</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="5.7" PeakHeight="438.218" Num="5" zHalfNm="379.636" Error="10.011">
-200.36 -61.836 40.08 -19.207 6.46
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="93.355" Depth="0.154"/>
<TopsideChapman PeakHeight="438.218" PeakDensity="403101.75" PeakScaleHeight="41.648" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
