<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 23:50:00.000"
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) 23:50:00</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">
FF202608603272350009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.640" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.991" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="385.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="385.000" 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="0.650" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="486.123" 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="3.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="415.815" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="361.764" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.591" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="80.249" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.864" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="40.812" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="86.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.510" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="93">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
415.000 417.500 420.000 415.000 405.000 405.000 385.000 385.577 386.154 386.731 387.308 387.885 388.462 389.038 389.615 390.192 390.769 391.346 391.923 392.500 393.077 393.654 394.231 394.808 395.385 395.962 396.538 397.115 397.692 398.269 398.846 399.423 400.000 400.577 401.154 401.731 402.308 402.885 403.462 404.038 404.615 405.192 405.769 406.346 406.923 407.500 408.077 408.654 409.231 409.808 410.385 410.962 411.538 412.115 412.692 413.269 413.846 414.423 415.000 415.000 417.500 420.000 420.000 420.000 427.500 435.000 436.905 438.810 440.714 442.619 444.524 446.429 448.333 450.238 452.143 454.048 455.952 457.857 459.762 461.667 463.571 465.476 467.381 469.286 474.315 479.896 486.123 493.118 501.029 510.051 520.435 532.515 546.742
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 57 57 57 57 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 57 0 0 0 60 0 0 0 0 0 0 0 60 0 0 0 0 0 0 0 57 60 57 0 66 60 60 0 54 51 51 51 51 0 54 54 0 0 0 0 0 0 0 0 0 0 54 0 0 57 0 51 48 0 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -2.734375 -0.390625 2.734375 1.171875 -1.171875 0.390625 0.390625 -0.390625 1.171875 -0.390625 -1.171875 0.390625 -0.390625 -2.734375 -1.171875 1.953125 0.390625 1.953125 -1.953125 -1.953125 0.390625 -1.171875 2.734375 -1.953125 -1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 2.734375 0.390625 0.390625 2.734375 0.390625 -0.390625 0.390625 0.390625 1.953125 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 -1.171875 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -1.171875 -0.390625 1.171875 -0.390625 0.390625 -2.734375 -0.390625 -2.734375 -1.953125 -2.734375 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 -1.171875 0.390625 -0.390625 0.390625 -1.171875 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="179">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.663 150.0 155.0 160.0 165.0 170.0 175.0 180.0 181.327 185.0 190.0 195.0 200.0 205.0 210.0 215.0 216.99 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 415.815 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.332 0.314 0.289 0.255 0.208 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.216 0.237 0.259 0.281 0.302 0.324 0.345 0.354 0.386 0.452 0.534 0.631 0.739 0.855 0.978 1.107 1.24 1.379 1.524 1.675 1.832 1.995 2.166 2.345 2.531 2.726 2.93 3.144 3.367 3.6 3.844 4.099 4.363 4.638 4.923 5.215 5.515 5.818 6.123 6.425 6.719 6.998 7.255 7.483 7.673 7.818 7.911 7.949 7.95 7.942 7.913 7.863 7.796 7.712 7.613 7.502 7.38 7.248 7.107 6.96 6.807 6.65 6.489 6.326 6.16 5.994 5.828 5.662 5.497 5.334 5.172 5.012 4.855 4.7 4.549 4.4 4.255 4.113 3.975 3.84 3.708 3.581 3.456 3.336 3.219 3.105 2.995 2.888 2.785 2.685 2.589 2.495 2.405 2.317 2.233 2.151 2.073 1.997 1.923 1.853 1.784 1.719 1.655 1.594 1.535 1.478 1.423 1.37 1.319 1.27 1.223 1.177 1.134 1.091 1.051 1.011 0.974 0.937 0.902 0.868 0.836 0.805 0.775 0.746 0.718 0.691 0.665 0.64 0.616 0.593 0.571 0.549 0.529 0.509 0.49 0.471 0.454 0.437 0.42 0.405 0.389 0.375 0.361 0.347 0.334 0.322 0.309 0.298 0.287 0.276 0.266 0.256 0.246 0.237 0.228 0.219 0.211 0.203

</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="7.95" PeakHeight="415.815" Num="5" zHalfNm="361.764" Error="3.416">
-184.506 -24.757 13.183 -1.424 -1.321
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="106.99" Depth="0.154"/>
<TopsideChapman PeakHeight="415.815" PeakDensity="784150.1" PeakScaleHeight="40.812" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
