<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-28 -087 22:30:00.000"
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, F2o cusp not found, 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" >
2026.03.28 (087) 22:30:00</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">
FF202608703282230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.709" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.810" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" 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="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="415.570" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="372.748" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.428" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="65.328" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.636" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="32.263" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="78.170" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.130" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="104">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 360.000 365.000 373.333 381.667 390.000 420.000 450.000 440.000 440.000 430.000 425.000 420.000 415.000 410.000 405.000 400.000 395.000 393.333 391.667 390.000 385.000 382.500 380.000 380.000 380.000 380.000 380.000 380.556 381.111 381.667 382.222 382.778 383.333 383.889 384.444 385.000 385.000 387.500 390.000 390.000 390.000 390.000 391.667 393.333 395.000 395.000 400.000 405.000 402.500 400.000 397.500 395.000 396.667 398.333 400.000 405.000 407.500 410.000 412.500 415.000 415.000 417.500 420.000 422.500 425.000 425.000 425.000 430.000 431.250 432.500 433.750 435.000 440.000 437.500 435.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000 495.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 54 0 0 54 48 54 54 54 54 0 0 51 0 48 48 54 0 0 48 48 0 48 0 54 0 60 0 0 0 0 0 0 0 54 54 54 0 54 0 0 54 0 0 54 57 54 57 0 60 0 54 0 0 57 63 54 57 0 57 57 0 60 0 63 0 60 54 0 0 0 66 54 0 63 48 0 0 0 48 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 54 51 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -2.734375 0.390625 1.171875 1.171875 1.953125 -1.171875 -1.171875 -1.953125 0.390625 -1.171875 2.734375 2.734375 -1.171875 -0.390625 -0.390625 0.390625 -0.390625 0.390625 1.953125 -0.390625 2.734375 -1.953125 1.171875 0.390625 -0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 -1.171875 -0.390625 1.171875 0.390625 0.390625 1.953125 -0.390625 -1.171875 1.171875 1.171875 0.390625 1.171875 -0.390625 0.390625 1.171875 -1.171875 0.390625 0.390625 -1.171875 -0.390625 -1.953125 0.390625 -0.390625 0.390625 0.390625 1.171875 0.390625 -1.171875 -0.390625 -1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 -0.390625 -1.171875 -1.171875 -0.390625 0.390625 0.390625 -1.171875 1.171875 -1.953125 2.734375 -1.953125 -1.953125 1.953125 0.390625 0.390625 0.390625 1.171875 1.953125 1.171875 -0.390625 -1.171875 2.734375 -0.390625 -1.953125 -1.953125 1.171875 -1.171875 1.171875 -2.734375 -1.171875 -2.734375 -1.171875 1.171875 -1.171875 -1.953125 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="156">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.711 145.0 150.0 155.0 160.0 165.0 170.0 175.0 175.423 180.0 185.0 190.0 195.0 200.0 205.0 208.134 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 415.57 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0
</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 0.328 0.306 0.275 0.231 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.245 0.269 0.292 0.316 0.339 0.354 0.381 0.459 0.544 0.633 0.725 0.821 0.92 1.022 1.128 1.237 1.35 1.467 1.589 1.715 1.847 1.983 2.125 2.274 2.428 2.589 2.758 2.934 3.118 3.31 3.512 3.723 3.945 4.177 4.421 4.677 4.946 5.228 5.524 5.833 6.155 6.488 6.827 7.164 7.484 7.763 7.965 8.049 8.05 8.036 7.987 7.908 7.801 7.672 7.522 7.356 7.177 6.986 6.787 6.582 6.372 6.16 5.947 5.734 5.523 5.315 5.109 4.907 4.71 4.518 4.331 4.149 3.973 3.802 3.637 3.478 3.325 3.178 3.036 2.9 2.769 2.644 2.524 2.409 2.298 2.193 2.092 1.995 1.903 1.815 1.731 1.65 1.573 1.5 1.43 1.363 1.299 1.238 1.18 1.125 1.072 1.022 0.974 0.928 0.884 0.843 0.803 0.765 0.729 0.695 0.662 0.631 0.601 0.573 0.546 0.52 0.495 0.472 0.45 0.428 0.408 0.389 0.37 0.353 0.336 0.32 0.305 0.291 0.277 0.264 0.252 0.24 0.228 0.218 0.207

</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="8.05" PeakHeight="415.57" Num="5" zHalfNm="372.748" Error="7.807">
-175.021 -53.92 24.732 -2.69 -0.537
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="98.134" Depth="0.154"/>
<TopsideChapman PeakHeight="415.57" PeakDensity="804001.25" PeakScaleHeight="32.263" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
