<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-18 -291 13:20:00.000"
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="15.0">
<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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.18 (291) 13:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629110181320009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.499" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.490" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="507.338" 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="3.328" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.332" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="373.972" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="247.563" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.208" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="166.650" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.684" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="92.982" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="203.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.480" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="88">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 362.728 365.457 368.185 370.914 373.642 376.371 379.099 381.828 384.556 387.285 390.013 392.742 395.470 398.199 400.927 403.656 406.384 409.113 411.841 414.570 417.298 420.026 422.755 425.483 428.212 430.940 433.669 436.397 439.126 441.854 444.583 447.311 450.040 452.768 455.497 458.225 460.954 463.682 466.411 469.139 471.868 474.596 477.324 480.053 482.781 485.510 488.238 490.967 493.695 496.424 499.152 501.881 504.609 507.338 510.066 515.000 525.000 530.000 540.000 545.000 560.000 570.000 585.000 600.000 620.000 640.000 670.000 706.028
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 63 66 66 66 66 66 63 66 66 66 66 0 66 66 0 66 66 66 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 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 0 0 0 0 0 0 0 0 0 0
</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 -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 2.734375 0.390625 2.734375 1.953125 -2.734375 -1.953125 1.171875 -1.171875 -1.171875 1.953125 0.390625 2.734375 -1.953125 2.734375 -0.390625 -2.734375 -1.171875 -1.953125 1.953125 1.171875 0.390625 -1.953125 2.734375 2.734375 2.734375 0.390625 1.171875 -2.734375 2.734375 1.171875 1.171875 -1.953125 -0.390625 2.734375 -2.734375 0.390625 2.734375 2.734375 1.953125 2.734375 0.390625 2.734375 -2.734375 0.390625 1.953125 -1.171875 -2.734375 2.734375 -0.390625 0.390625 -2.734375 0.390625 2.734375 -0.390625 -1.953125 -2.734375 1.953125 -0.390625 1.953125 -1.953125 2.734375 -1.171875 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" >
89.493 90.0 95.0 100.0 105.0 110.0 111.804 113.609 115.0 115.413 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 373.972 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.239 2.88 3.22 3.328 3.205 3.205 3.3 3.328 3.483 3.65 3.815 3.979 4.14 4.301 4.459 4.617 4.773 4.929 5.084 5.239 5.393 5.547 5.701 5.855 6.009 6.163 6.318 6.473 6.629 6.785 6.941 7.098 7.256 7.414 7.573 7.732 7.891 8.05 8.21 8.369 8.528 8.686 8.844 8.999 9.153 9.305 9.453 9.597 9.736 9.87 9.996 10.114 10.223 10.32 10.405 10.476 10.532 10.572 10.594 10.6 10.6 10.596 10.586 10.57 10.55 10.524 10.493 10.457 10.417 10.373 10.325 10.272 10.216 10.157 10.094 10.028 9.959 9.888 9.813 9.737 9.658 9.577 9.494 9.409 9.323 9.235 9.145 9.055 8.963 8.87 8.777 8.682 8.587 8.491 8.395 8.299 8.202 8.105 8.007 7.91 7.813 7.716 7.618 7.522 7.425 7.329 7.232 7.137 7.042 6.947 6.853 6.759 6.666 6.574 6.482 6.391 6.301 6.212 6.123 6.035 5.948 5.862 5.776 5.691 5.608 5.525 5.443 5.362 5.281 5.202 5.124 5.046 4.97 4.894 4.819 4.745 4.672 4.6 4.529 4.459 4.39 4.322 4.254 4.188 4.122 4.057 3.993 3.93 3.868 3.807 3.747 3.687 3.629 3.571 3.514 3.458 3.402 3.348 3.294 3.241 3.189 3.138 3.087 3.037 2.988 2.94 2.892 2.845 2.799 2.754 2.709 2.665 2.622 2.579 2.537 2.496 2.455 2.415 2.375 2.336 2.298 2.26 2.223 2.187 2.151 2.116

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.328" PeakHeight="110.0" Num="3" Error="0.0">
-30.456 13.085 -3.136
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.328" EndFrequency="10.6" PeakHeight="373.972" Num="5" zHalfNm="247.563" Error="2.283">
-235.61 -35.333 13.353 -0.711 -0.258
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.413" Depth="0.123"/>
<TopsideChapman PeakHeight="373.972" PeakDensity="1394044.6" PeakScaleHeight="92.982" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
