<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 20:20:00.000"
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="12.0">
<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="1 2 0 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, 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" >
2026.10.21 (294) 20:20:00</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">
FF202629410212020009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.530" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.687" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.150" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.210" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="94.523" Name="h`E" 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="9.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.822" 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="1.641" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="389.379" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="290.928" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.416" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="140.714" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="42.914" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="73.052" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="142.990" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.940" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="123">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 298.750 297.500 296.250 295.000 295.833 296.667 297.500 298.333 299.167 300.000 301.429 302.857 304.286 305.714 307.143 308.571 310.000 311.429 312.857 314.286 315.714 317.143 318.571 320.000 320.000 320.000 320.000 325.000 325.000 320.000 325.000 325.833 326.667 327.500 328.333 329.167 330.000 331.538 333.077 334.615 336.154 337.692 339.231 340.769 342.308 343.846 345.385 346.923 348.462 350.000 350.000 350.000 352.500 355.000 357.500 360.000 362.500 365.000 367.500 370.000 370.000 370.000 370.000 375.000 380.000 380.000 380.000 380.000 382.896 385.791 388.687 391.582 394.478 397.373 400.269 403.164 406.060 408.956 411.851 414.747 417.642 420.538 423.433 426.329 429.225 432.120 435.016 437.911 440.807 443.702 446.598 449.493 452.389 455.285 458.180 461.076 463.971 466.867 469.762 472.658 475.554 478.449 481.345 484.240 487.136 490.031 492.927 495.822 500.774 505.000 510.000 520.000 525.000 535.000 540.000 550.000 565.000 575.000 590.000 610.000 630.000 651.557
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 60 0 72 0 75 0 0 0 75 0 57 0 0 0 57 0 0 0 0 0 0 0 54 0 0 66 0 60 66 57 0 0 0 0 0 69 0 0 0 0 69 0 0 75 0 0 0 0 81 78 0 0 0 0 0 0 60 0 69 75 75 78 0 75 81 81 78 63 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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -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 -2.734375 0.390625 2.734375 1.953125 1.953125 0.390625 1.171875 1.171875 -0.390625 0.390625 -0.390625 -1.171875 -0.390625 2.734375 -0.390625 -1.171875 2.734375 0.390625 1.171875 -0.390625 2.734375 1.953125 2.734375 2.734375 0.390625 -2.734375 -2.734375 2.734375 -2.734375 0.390625 0.390625 -1.953125 2.734375 -2.734375 1.953125 -1.953125 2.734375 0.390625 -1.953125 2.734375 -1.171875 1.171875 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.15 1.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
94.523 95.014
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.095 95.0 100.0 105.0 110.0 115.0 120.0 120.322 125.0 130.0 130.644 135.0 140.0 140.966 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 389.379 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.807 1.048 1.171 1.21 1.186 1.113 1.106 1.106 1.106 1.106 1.15 1.2 1.21 1.313 1.436 1.559 1.686 1.817 1.956 2.102 2.258 2.424 2.601 2.788 2.987 3.197 3.416 3.645 3.882 4.125 4.373 4.626 4.881 5.138 5.395 5.653 5.91 6.166 6.42 6.673 6.923 7.171 7.415 7.656 7.893 8.126 8.353 8.576 8.792 9.001 9.202 9.394 9.577 9.748 9.906 10.051 10.179 10.291 10.385 10.458 10.511 10.541 10.55 10.55 10.544 10.529 10.505 10.473 10.433 10.385 10.33 10.269 10.202 10.128 10.049 9.966 9.877 9.784 9.687 9.587 9.483 9.376 9.267 9.155 9.041 8.925 8.807 8.688 8.568 8.447 8.325 8.203 8.08 7.956 7.833 7.71 7.587 7.464 7.342 7.22 7.099 6.978 6.859 6.74 6.622 6.506 6.39 6.275 6.162 6.05 5.939 5.83 5.722 5.615 5.51 5.406 5.303 5.202 5.103 5.005 4.908 4.813 4.719 4.627 4.536 4.447 4.36 4.273 4.189 4.105 4.023 3.943 3.864 3.786 3.71 3.635 3.561 3.489 3.418 3.349 3.281 3.214 3.148 3.084 3.02 2.958 2.898 2.838 2.78 2.722 2.666 2.611 2.557 2.504 2.452 2.401 2.351 2.303 2.255 2.208 2.162 2.117 2.073 2.029 1.987 1.945 1.905 1.865 1.826 1.788 1.75 1.714 1.678 1.642 1.608 1.574 1.541 1.509 1.477 1.446 1.416 1.386 1.357 1.328 1.3 1.273

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.21" PeakHeight="110.0" Num="3" Error="0.0">
-27.315 8.908 -1.498
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.21" EndFrequency="10.55" PeakHeight="389.379" Num="5" zHalfNm="290.928" Error="3.63">
-245.035 -7.23 5.965 -4.299 2.186
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="30.966" Depth="0.104"/>
<TopsideChapman PeakHeight="389.379" PeakDensity="1380924.4" PeakScaleHeight="73.052" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
