<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-12 -285 19:20:00.000"
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="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 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" >
2026.10.12 (285) 19:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.38" 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">
FF202628510121920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.505" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.924" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="10.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="502.292" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.434" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="378.173" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="263.722" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.438" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="156.604" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.315" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.292" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="174.700" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.640" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="100">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 352.873 355.747 358.620 361.494 364.367 367.241 370.114 372.987 375.861 378.734 381.608 384.481 387.355 390.228 393.102 395.975 398.848 401.722 404.595 407.469 410.342 413.216 416.089 418.962 421.836 424.709 427.583 430.456 433.330 436.203 439.076 441.950 444.823 447.697 450.570 453.444 456.317 459.191 462.064 464.937 467.811 470.684 473.558 476.431 479.305 482.178 485.051 487.925 490.798 493.672 496.545 499.419 502.292 505.165 510.000 515.000 520.000 530.000 535.000 545.000 555.000 565.000 575.000 590.000 605.000 620.000 645.000 667.488
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 75 72 69 75 75 72 75 75 75 72 75 78 78 72 75 78 75 75 78 78 75 75 75 75 75 69 75 75 72 75 69 0 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 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 -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 1.171875 -0.390625 -2.734375 1.953125 -0.390625 -1.171875 -0.390625 -0.390625 0.390625 0.390625 1.953125 -1.171875 -0.390625 -2.734375 -2.734375 0.390625 -1.171875 -1.953125 -0.390625 -0.390625 -1.171875 1.953125 -0.390625 1.171875 1.171875 1.171875 -1.953125 -1.953125 2.734375 1.171875 1.171875 -0.390625 -1.171875 -0.390625 0.390625 -1.171875 2.734375 1.171875 -1.171875 0.390625 -1.953125 1.953125 1.953125 1.171875 0.390625 1.953125 2.734375 2.734375 -2.734375 -2.734375 -0.390625 -1.171875 0.390625 1.171875 2.734375 0.390625 -2.734375 2.734375 -1.171875
</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" >
89.654 90.0 95.0 100.0 105.0 110.0 115.0 115.913 120.0 121.825 125.0 127.738 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 378.173 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.229 1.634 2.107 2.355 2.434 2.345 2.309 2.309 2.309 2.376 2.434 2.512 2.677 2.838 2.999 3.161 3.328 3.499 3.675 3.857 4.043 4.235 4.431 4.63 4.833 5.038 5.244 5.451 5.658 5.864 6.069 6.273 6.476 6.676 6.875 7.072 7.267 7.459 7.65 7.838 8.025 8.209 8.391 8.571 8.748 8.923 9.095 9.263 9.428 9.589 9.745 9.896 10.04 10.176 10.302 10.417 10.518 10.604 10.672 10.719 10.745 10.75 10.749 10.743 10.729 10.709 10.682 10.649 10.609 10.564 10.514 10.458 10.397 10.332 10.263 10.189 10.112 10.031 9.947 9.86 9.77 9.678 9.583 9.486 9.387 9.286 9.183 9.08 8.974 8.868 8.761 8.653 8.544 8.435 8.325 8.215 8.105 7.995 7.885 7.775 7.665 7.555 7.446 7.338 7.229 7.122 7.015 6.908 6.803 6.698 6.594 6.491 6.389 6.287 6.187 6.088 5.99 5.892 5.796 5.701 5.607 5.514 5.423 5.332 5.243 5.154 5.067 4.981 4.896 4.813 4.73 4.649 4.569 4.49 4.412 4.335 4.26 4.185 4.112 4.04 3.969 3.899 3.83 3.762 3.695 3.63 3.565 3.501 3.439 3.378 3.317 3.258 3.199 3.142 3.085 3.029 2.975 2.921 2.868 2.816 2.765 2.715 2.666 2.617 2.57 2.523 2.477 2.432 2.388 2.344 2.301 2.259 2.218 2.177 2.137 2.098 2.06 2.022 1.985 1.949 1.913 1.878 1.843 1.809 1.776 1.743 1.711

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.434" PeakHeight="110.0" Num="3" Error="0.0">
-29.64 11.906 -2.612
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.434" EndFrequency="10.75" PeakHeight="378.173" Num="5" zHalfNm="263.722" Error="3.419">
-235.953 -25.538 15.516 -6.612 2.152
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="17.738" Depth="0.125"/>
<TopsideChapman PeakHeight="378.173" PeakDensity="1433777.9" PeakScaleHeight="83.292" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
