<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 22:50:00.000"
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 2 0 0 0 0 0 0 0 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match, 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" >
2026.03.15 (074) 22:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607403152250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="9.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.822" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.399" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="457.173" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="388.159" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="351.729" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.181" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="55.144" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="12.465" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="27.983" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="63.570" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.100" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="125">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 310.000 320.000 330.500 341.000 351.500 362.000 372.500 383.000 393.500 380.000 375.000 375.000 380.000 380.588 381.176 381.765 382.353 382.941 383.529 384.118 384.706 385.294 385.882 386.471 387.059 387.647 388.235 388.824 389.412 390.000 385.000 390.000 389.333 388.667 388.000 387.333 386.667 386.000 385.333 384.667 384.000 383.333 382.667 382.000 381.333 380.667 380.000 385.000 380.000 378.333 376.667 375.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 382.500 385.000 390.000 387.500 385.000 386.667 388.333 390.000 390.000 390.000 395.000 395.000 400.000 405.000 410.000 410.000 410.000 410.000 410.000 410.000 407.500 405.000 405.000 410.000 415.000 422.500 430.000 435.000 435.000 435.000 435.000 440.000 445.000 447.500 450.000 450.000 451.466 453.636 457.173 463.966 482.349
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 57 51 0 0 0 54 0 0 54 54 51 54 0 0 60 0 0 0 54 0 0 0 0 0 0 0 0 0 57 63 54 51 0 0 0 54 54 0 0 0 0 0 0 54 0 54 57 51 0 0 51 51 54 0 0 0 0 0 0 51 0 0 0 0 0 0 0 0 51 0 0 51 51 54 60 0 51 0 66 66 66 66 60 60 57 51 60 0 0 69 0 63 66 66 60 66 54 60 57 60 54 57 63 60 60 57 60 0 60 51 66 51 57 0 57 0 60 60 0 66 63 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 0.390625 1.171875 -0.390625 1.953125 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 -0.390625 2.734375 0.390625 0.390625 0.390625 0.390625 -1.171875 -0.390625 0.390625 0.390625 0.390625 2.734375 -0.390625 1.171875 1.171875 0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 1.171875 -1.953125 0.390625 -0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 2.734375 -0.390625 0.390625 -1.171875 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 -2.734375 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 0.390625 -1.953125 1.171875 1.171875 -1.171875 0.390625 0.390625 -2.734375 1.171875 0.390625 0.390625 -0.390625 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 -0.390625 1.171875 0.390625 2.734375 1.171875 -1.953125 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 1.171875 0.390625 -0.390625 0.390625 1.171875 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="141">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.487 145.0 150.0 155.0 160.0 165.0 170.0 175.0 176.975 180.0 185.0 190.0 195.0 200.0 205.0 210.0 210.462 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 388.159 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.329 0.308 0.279 0.238 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.214 0.237 0.26 0.283 0.306 0.329 0.352 0.354 0.412 0.501 0.616 0.743 0.874 1.007 1.14 1.276 1.416 1.559 1.708 1.863 2.024 2.194 2.373 2.561 2.761 2.973 3.2 3.442 3.702 3.981 4.283 4.609 4.963 5.346 5.759 6.204 6.675 7.163 7.651 8.111 8.507 8.803 8.97 9.0 8.996 8.95 8.857 8.722 8.553 8.356 8.134 7.895 7.641 7.378 7.108 6.834 6.56 6.287 6.016 5.75 5.49 5.236 4.989 4.751 4.52 4.298 4.084 3.879 3.683 3.495 3.315 3.144 2.981 2.825 2.677 2.536 2.402 2.275 2.154 2.04 1.931 1.828 1.73 1.637 1.549 1.466 1.387 1.312 1.241 1.174 1.111 1.051 0.994 0.94 0.89 0.841 0.796 0.753 0.712 0.673 0.637 0.602 0.57 0.539 0.51 0.482 0.456 0.431 0.408 0.386 0.365 0.345 0.326 0.308 0.292 0.276 0.261 0.247 0.233 0.221 0.209

</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="9.0" PeakHeight="388.159" Num="5" zHalfNm="351.729" Error="5.572">
-151.21 -41.526 16.367 1.715 -3.043
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="100.462" Depth="0.154"/>
<TopsideChapman PeakHeight="388.159" PeakDensity="1004962.75" PeakScaleHeight="27.983" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
