<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-18 -291 13:30:00.000"
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="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: 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" >
2026.10.18 (291) 13:30:00</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">
FF202629110181330009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.516" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.924" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="502.497" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.345" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.340" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="377.817" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="249.824" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.261" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="171.376" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="58.191" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="95.777" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="200.240" 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="98">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 352.723 355.446 358.169 360.893 363.616 366.339 369.062 371.785 374.508 377.232 379.955 382.678 385.401 388.124 390.847 393.571 396.294 399.017 401.740 404.463 407.186 409.910 412.633 415.356 418.079 420.802 423.525 426.249 428.972 431.695 434.418 437.141 439.864 442.588 445.311 448.034 450.757 453.480 456.203 458.927 461.650 464.373 467.096 469.819 472.542 475.266 477.989 480.712 483.435 486.158 488.881 491.605 494.328 497.051 499.774 502.497 510.000 515.000 525.000 535.000 540.000 555.000 565.000 580.000 595.000 615.000 635.000 660.000 690.000 728.704
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 60 60 0 63 63 63 63 66 66 66 63 63 66 66 69 69 69 69 66 0 69 69 72 72 0 69 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 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 1.953125 0.390625 -1.953125 2.734375 -1.171875 0.390625 -2.734375 2.734375 1.953125 1.171875 -1.171875 0.390625 -1.171875 2.734375 2.734375 -2.734375 1.953125 -2.734375 2.734375 0.390625 -1.953125 0.390625 1.171875 -0.390625 -2.734375 0.390625 0.390625 1.171875 0.390625 1.953125 -2.734375 -1.171875 -2.734375 -1.953125 -2.734375 0.390625 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -2.734375 -2.734375 -1.171875 -1.953125 -1.171875 1.171875 -2.734375 1.953125 -0.390625 2.734375 0.390625 2.734375 -0.390625 -1.953125 -2.734375 2.734375 -0.390625 -2.734375 2.734375 -0.390625 -0.390625 -1.171875 -1.953125
</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 95.0 100.0 105.0 110.0 111.736 113.473 115.0 115.209 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 377.817 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.25 2.895 3.236 3.345 3.222 3.222 3.33 3.345 3.506 3.667 3.824 3.977 4.127 4.277 4.425 4.573 4.721 4.869 5.018 5.168 5.319 5.47 5.623 5.778 5.933 6.091 6.249 6.41 6.571 6.735 6.9 7.066 7.234 7.402 7.572 7.743 7.914 8.085 8.256 8.427 8.596 8.764 8.93 9.094 9.253 9.409 9.56 9.705 9.843 9.974 10.097 10.21 10.313 10.406 10.487 10.556 10.611 10.654 10.683 10.698 10.7 10.699 10.694 10.684 10.668 10.647 10.621 10.59 10.555 10.516 10.473 10.426 10.375 10.32 10.263 10.202 10.138 10.071 10.001 9.929 9.855 9.778 9.7 9.619 9.537 9.453 9.367 9.281 9.192 9.103 9.013 8.922 8.83 8.737 8.644 8.55 8.455 8.361 8.266 8.17 8.075 7.98 7.884 7.789 7.694 7.599 7.504 7.41 7.316 7.222 7.128 7.036 6.943 6.851 6.76 6.669 6.579 6.49 6.401 6.313 6.226 6.139 6.053 5.968 5.884 5.801 5.718 5.636 5.555 5.475 5.396 5.317 5.239 5.163 5.087 5.012 4.938 4.865 4.792 4.721 4.65 4.58 4.511 4.443 4.376 4.31 4.245 4.18 4.116 4.054 3.991 3.93 3.87 3.81 3.752 3.694 3.637 3.58 3.525 3.47 3.416 3.363 3.311 3.259 3.208 3.158 3.108 3.06 3.012 2.964 2.918 2.872 2.827 2.782 2.738 2.695 2.652 2.61 2.569 2.528 2.488 2.449 2.41 2.372 2.334 2.297

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.345" PeakHeight="110.0" Num="3" Error="0.0">
-30.468 13.103 -3.145
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.345" EndFrequency="10.7" PeakHeight="377.817" Num="5" zHalfNm="249.824" Error="3.874">
-242.694 -27.703 6.438 1.466 -0.115
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.209" Depth="0.123"/>
<TopsideChapman PeakHeight="377.817" PeakDensity="1420471.5" PeakScaleHeight="95.777" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
