<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 13:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.03.30 (089) 13:50:00</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">
FF202608903301350009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="12.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.509" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.243" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="507.081" 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="3.347" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.340" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="380.285" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="267.211" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.612" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="153.367" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="74.244" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.965" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="177.580" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.570" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="161">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 230.000 240.000 245.000 250.000 255.000 260.000 265.000 275.000 280.000 282.273 284.545 286.818 289.091 291.364 293.636 295.909 298.182 300.455 302.727 305.000 305.000 305.000 305.000 305.000 305.000 306.111 307.222 308.333 309.444 310.556 311.667 312.778 313.889 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 365.000 366.000 367.000 368.000 369.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 395.000 396.667 398.333 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 412.000 414.000 416.000 418.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 428.333 431.667 435.000 437.143 439.286 441.429 443.571 445.714 447.857 450.000 450.000 455.000 455.000 455.000 455.000 460.000 465.000 470.000 470.000 470.000 472.500 475.000 475.000 477.500 480.000 485.000 487.542 490.254 493.153 496.261 499.599 503.196 507.081 511.291 515.869 520.865 526.339 532.363 539.025 546.431 554.713 564.038 574.613 586.710 600.683 617.004 636.319 659.536 687.970
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 45 45 0 0 48 48 54 48 0 45 0 0 0 0 0 0 48 0 48 0 0 0 51 51 0 51 0 48 0 0 0 0 54 54 0 0 48 54 63 63 66 63 0 63 66 0 69 66 66 72 69 69 66 69 69 69 66 51 66 66 69 69 66 69 60 0 63 66 60 63 66 63 0 0 0 0 60 0 51 57 54 57 60 60 66 69 69 54 0 0 51 57 57 60 57 60 57 57 60 0 0 0 0 57 57 57 48 48 51 54 0 0 45 0 0 0 0 0 0 48 54 51 54 0 0 45 48 48 54 54 0 54 0 54 48 48 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 45 0 45 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 0.390625 -2.734375 -2.734375 -1.953125 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 2.734375 0.390625 -1.953125 2.734375 2.734375 2.734375 -0.390625 0.390625 -0.390625 -1.171875 2.734375 -0.390625 0.390625 -0.390625 -1.953125 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.953125 -0.390625 -0.390625 -2.734375 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.49 90.0 95.0 100.0 105.0 110.0 111.728 113.457 115.0 115.185 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 380.285 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.252 2.897 3.238 3.347 3.224 3.224 3.334 3.347 3.506 3.663 3.817 3.968 4.12 4.273 4.427 4.584 4.744 4.908 5.075 5.246 5.422 5.602 5.786 5.975 6.168 6.366 6.568 6.774 6.984 7.197 7.414 7.633 7.855 8.078 8.304 8.53 8.758 8.986 9.213 9.441 9.667 9.893 10.116 10.338 10.557 10.772 10.984 11.191 11.392 11.587 11.774 11.952 12.12 12.275 12.416 12.541 12.647 12.733 12.796 12.836 12.85 12.85 12.846 12.834 12.813 12.784 12.748 12.705 12.654 12.598 12.534 12.466 12.391 12.311 12.227 12.138 12.044 11.946 11.845 11.74 11.632 11.521 11.408 11.292 11.173 11.053 10.931 10.807 10.682 10.555 10.428 10.299 10.17 10.041 9.91 9.78 9.649 9.519 9.388 9.258 9.128 8.998 8.868 8.74 8.611 8.484 8.357 8.231 8.106 7.982 7.859 7.737 7.616 7.496 7.377 7.26 7.144 7.028 6.915 6.802 6.691 6.581 6.472 6.365 6.259 6.154 6.051 5.949 5.849 5.75 5.652 5.555 5.46 5.367 5.274 5.183 5.094 5.005 4.918 4.833 4.748 4.665 4.584 4.503 4.424 4.346 4.269 4.194 4.12 4.047 3.975 3.904 3.835 3.766 3.699 3.633 3.568 3.504 3.441 3.379 3.319 3.259 3.2 3.143 3.086 3.03 2.975 2.922 2.869 2.817 2.766 2.716 2.666 2.618 2.571 2.524 2.478 2.433 2.389 2.345 2.302 2.26 2.219 2.179 2.139 2.1

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.347" PeakHeight="110.0" Num="3" Error="0.0">
-30.47 13.106 -3.146
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.347" EndFrequency="12.85" PeakHeight="380.285" Num="5" zHalfNm="267.211" Error="4.476">
-234.355 -38.524 8.311 -2.036 1.504
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.185" Depth="0.123"/>
<TopsideChapman PeakHeight="380.285" PeakDensity="2048666.2" PeakScaleHeight="83.965" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
