<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, 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" >
2026.03.27 (086) 22:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608603272250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.882" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.768" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="395.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="395.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="420.846" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="419.290" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="394.463" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.182" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="40.930" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.254" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="18.950" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="70.360" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="107">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
395.000 400.000 407.500 415.000 418.333 421.667 425.000 426.111 427.222 428.333 429.444 430.556 431.667 432.778 433.889 435.000 435.000 430.000 425.000 423.750 422.500 421.250 420.000 417.500 415.000 415.000 415.000 415.000 412.500 410.000 410.000 410.000 405.000 405.000 405.000 410.000 415.000 420.000 425.000 405.000 415.000 420.000 420.000 426.250 432.500 438.750 445.000 443.333 441.667 440.000 445.000 445.000 445.000 450.000 449.167 448.333 447.500 446.667 445.833 445.000 455.000 465.000 475.000 475.000 477.333 479.667 482.000 484.333 486.667 489.000 491.333 493.667 496.000 498.333 500.667 503.000 505.333 507.667 510.000 495.000 490.000 485.000 480.000 475.000 470.000 465.000 460.000 457.500 455.000 445.000 442.857 440.714 438.571 436.429 434.286 432.143 430.000 430.000 415.000 417.603 420.846 425.000 430.511 438.173 449.552 468.218 504.468
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 0 57 0 0 60 63 0 0 63 0 60 0 0 60 54 0 63 0 0 0 60 0 63 54 0 54 0 57 0 60 60 66 63 0 66 63 60 60 54 57 57 60 0 0 51 0 0 54 51 0 54 51 0 0 51 0 51 54 51 0 51 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 48 48 48 0 54 54 0 54 54 51 57 0 0 0 0 0 0 54 0 57 0 0 48 54 54 48 57 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -0.390625 -1.171875 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -1.171875 -0.390625 -1.171875 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 0.390625 -1.171875 -1.171875 1.171875 0.390625 -1.953125 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 0.390625 0.390625 -1.953125 -2.734375 -0.390625 -1.171875 -0.390625 0.390625 0.390625 -0.390625 -2.734375 -1.171875 -0.390625 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 0.390625 -0.390625 1.171875 -0.390625 -1.953125 -0.390625 -1.953125 -2.734375 -0.390625 -2.734375 -2.734375 -0.390625 -1.171875 1.171875 -2.734375 -0.390625 -2.734375 -1.171875 1.171875 -0.390625 -1.171875 1.171875 -1.953125 -0.390625 -0.390625 -1.171875 -1.953125 -0.390625 -0.390625 0.390625 -0.390625 -2.734375 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 -1.953125 -0.390625 1.953125 0.390625 -2.734375 2.734375 0.390625 -0.390625 2.734375 -1.953125 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="121">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.686 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.373 180.0 185.0 190.0 195.0 200.0 205.0 210.0 211.059 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 419.29 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0
</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 0.309 0.28 0.24 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.212 0.235 0.258 0.281 0.303 0.326 0.349 0.354 0.415 0.504 0.597 0.69 0.781 0.871 0.961 1.052 1.143 1.235 1.329 1.424 1.522 1.622 1.725 1.831 1.941 2.054 2.17 2.291 2.417 2.548 2.684 2.826 2.974 3.13 3.293 3.464 3.645 3.837 4.04 4.256 4.487 4.736 5.005 5.299 5.623 5.984 6.394 6.875 7.457 7.9 7.899 7.834 7.683 7.463 7.191 6.881 6.546 6.197 5.841 5.487 5.138 4.8 4.474 4.162 3.866 3.587 3.323 3.077 2.846 2.631 2.43 2.244 2.071 1.911 1.763 1.626 1.499 1.382 1.273 1.173 1.081 0.996 0.918 0.845 0.779 0.717 0.661 0.609 0.56 0.516 0.475 0.438 0.403 0.371 0.342 0.315 0.29 0.267 0.246 0.226 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="7.9" PeakHeight="419.29" Num="5" zHalfNm="394.463" Error="7.374">
-152.675 -90.06 39.094 -2.833 -1.757
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="101.059" Depth="0.154"/>
<TopsideChapman PeakHeight="419.29" PeakDensity="774317.6" PeakScaleHeight="18.95" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
