<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 03:30:00.000"
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="14.0">
<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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, Trace overlaps while constructing baseline</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" >
2026.10.25 (298) 03:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629810250330009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="8.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.035" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.796" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="195.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="195.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="397.022" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="324.446" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="269.771" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.482" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="82.044" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="15.320" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.269" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="85.650" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.800" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="143">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.4 1.45 1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 205.000 200.000 200.000 195.000 195.000 195.000 195.000 200.000 200.000 205.000 208.333 211.667 215.000 216.222 217.444 218.667 219.889 221.111 222.333 223.556 224.778 226.000 227.222 228.444 229.667 230.889 232.111 233.333 234.556 235.778 237.000 238.222 239.444 240.667 241.889 243.111 244.333 245.556 246.778 248.000 249.222 250.444 251.667 252.889 254.111 255.333 256.556 257.778 259.000 260.222 261.444 262.667 263.889 265.111 266.333 267.556 268.778 270.000 271.667 273.333 275.000 270.000 280.000 290.000 300.000 310.000 310.345 310.690 311.034 311.379 311.724 312.069 312.414 312.759 313.103 313.448 313.793 314.138 314.483 314.828 315.172 315.517 315.862 316.207 316.552 316.897 317.241 317.586 317.931 318.276 318.621 318.966 319.310 319.655 320.000 330.000 340.000 335.000 340.000 345.000 346.667 348.333 350.000 350.000 355.000 360.000 362.500 365.000 375.000 365.000 367.500 370.000 370.000 372.500 350.000 355.000 355.000 360.000 362.500 365.000 370.000 375.000 380.000 380.330 380.695 381.101 381.556 382.068 382.650 383.317 384.089 384.992 386.063 387.354 388.941 390.938 393.529 397.022 401.990 409.619 422.823 451.240
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 66 69 66 69 75 63 69 69 69 0 0 57 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 63 0 0 60 57 0 0 0 0 0 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 63 60 60 0 60 0 0 57 63 60 60 63 63 57 60 0 60 60 0 63 0 57 66 0 66 0 0 57 0 0 0 60 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 -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 -1.171875 0.390625 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 -1.171875 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 1.171875 0.390625 1.171875 1.171875 -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 -1.171875 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 2.734375 0.390625 -1.171875 0.390625 1.171875 0.390625 0.390625 -1.171875 1.171875 -1.171875 -1.171875 0.390625 0.390625 -1.171875 0.390625 -1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 -1.171875 1.171875 0.390625 0.390625 1.171875 2.734375 1.171875 -1.171875 1.171875 0.390625 -1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 1.171875 -1.171875 1.953125 1.171875 -1.171875 1.171875 -1.171875 -0.390625 1.953125 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="158">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 129.833 130.0 135.0 140.0 145.0 149.667 150.0 155.0 160.0 165.0 169.5 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 324.446 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.348 0.33 0.298 0.248 0.248 0.248 0.248 0.248 0.248 0.25 0.277 0.303 0.33 0.354 0.363 0.448 0.549 0.691 0.942 1.47 2.025 2.448 2.805 3.124 3.421 3.702 3.973 4.237 4.496 4.752 5.006 5.26 5.513 5.767 6.022 6.279 6.539 6.801 7.065 7.33 7.594 7.853 8.096 8.307 8.454 8.5 8.5 8.484 8.443 8.381 8.298 8.197 8.081 7.95 7.808 7.655 7.494 7.326 7.152 6.974 6.793 6.61 6.426 6.241 6.056 5.873 5.691 5.512 5.335 5.16 4.989 4.822 4.658 4.498 4.341 4.189 4.041 3.897 3.757 3.621 3.489 3.362 3.238 3.119 3.003 2.891 2.783 2.679 2.578 2.481 2.387 2.296 2.209 2.125 2.044 1.966 1.891 1.818 1.748 1.681 1.617 1.554 1.494 1.437 1.381 1.328 1.276 1.227 1.18 1.134 1.09 1.048 1.007 0.968 0.93 0.894 0.859 0.826 0.794 0.763 0.733 0.705 0.677 0.651 0.626 0.601 0.578 0.555 0.534 0.513 0.493 0.474 0.455 0.438 0.421 0.404 0.388 0.373 0.359 0.345 0.331 0.318 0.306 0.294 0.283 0.272 0.261 0.251 0.241 0.232 0.223 0.214 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="8.5" PeakHeight="324.446" Num="5" zHalfNm="269.771" Error="3.839">
-160.864 -4.585 24.805 -20.02 5.718
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="59.5" Depth="0.106"/>
<TopsideChapman PeakHeight="324.446" PeakDensity="896402.0" PeakScaleHeight="39.269" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
