<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 14:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.10.17 (290) 14:00:00</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">
FF202629010171400009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.624" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.574" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="11.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" 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="3.382" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.357" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="356.569" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="252.326" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.437" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="138.435" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.926" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="77.799" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="175.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.340" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="113">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 315.000 316.000 317.000 318.000 319.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 326.829 328.659 330.488 332.317 334.146 335.976 337.805 339.634 341.463 343.293 345.122 346.951 348.780 350.610 352.439 354.268 356.098 357.927 359.756 361.585 363.415 365.244 367.073 368.902 370.732 372.561 374.390 376.220 378.049 379.878 381.707 383.537 385.366 387.195 389.024 390.854 392.683 394.512 396.341 398.171 400.000 401.829 403.659 405.488 407.317 409.146 410.976 412.805 414.634 416.463 418.293 420.122 421.951 423.780 425.610 427.439 429.268 431.098 432.927 434.756 436.585 438.415 440.244 442.073 443.902 445.732 447.561 449.390 451.220 453.049 454.878 456.707 458.537 460.366 462.195 464.024 465.854 467.683 469.512 471.341 473.171 475.000 480.000 490.000 495.000 505.000 505.000 515.000 525.000 535.000 545.000 560.000 580.000 605.000 644.804
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 57 0 0 0 0 63 63 69 69 69 66 69 72 72 66 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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 57 48 51 45 51 57 57 57 57 57 51 51 48
</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 -1.953125 -0.390625 0.390625 0.390625 -0.390625 -1.953125 -2.734375 0.390625 -0.390625 -2.734375 -1.171875 2.734375 1.171875 0.390625 0.390625 -0.390625 -2.734375 -1.953125 -2.734375 0.390625 1.953125 0.390625 -0.390625 1.953125 1.171875 1.953125 2.734375 -2.734375 -2.734375 1.171875 -0.390625 2.734375 -1.953125 -1.171875 -1.953125 0.390625 -0.390625 -0.390625 -2.734375 1.171875 -1.171875 -2.734375 0.390625 -1.171875 0.390625 1.171875 2.734375 -0.390625 -1.953125 -0.390625 0.390625 2.734375 -1.171875 -1.953125 1.171875 -1.953125 -1.171875 1.953125 0.390625 -2.734375 1.171875 -2.734375 -1.953125 2.734375 -2.734375 1.953125 1.171875 -0.390625 -1.171875 1.953125 1.953125 -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 -0.390625 -0.390625 -0.390625 -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" >
89.485 90.0 95.0 100.0 105.0 110.0 111.584 113.168 114.752 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 356.569 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.275 2.927 3.272 3.382 3.259 3.259 3.382 3.392 3.589 3.778 3.961 4.139 4.313 4.483 4.652 4.818 4.984 5.149 5.314 5.479 5.645 5.811 5.979 6.148 6.318 6.49 6.664 6.84 7.019 7.2 7.383 7.57 7.759 7.951 8.146 8.344 8.545 8.748 8.954 9.162 9.371 9.581 9.792 10.0 10.206 10.408 10.603 10.79 10.965 11.126 11.271 11.395 11.497 11.575 11.626 11.649 11.65 11.648 11.637 11.617 11.589 11.553 11.51 11.459 11.402 11.338 11.268 11.192 11.111 11.025 10.934 10.839 10.74 10.638 10.532 10.423 10.311 10.196 10.08 9.961 9.84 9.718 9.595 9.47 9.345 9.219 9.092 8.964 8.837 8.709 8.581 8.453 8.326 8.199 8.072 7.946 7.82 7.695 7.571 7.448 7.326 7.205 7.085 6.966 6.848 6.731 6.616 6.502 6.389 6.277 6.167 6.058 5.951 5.845 5.74 5.637 5.535 5.435 5.336 5.238 5.142 5.048 4.955 4.863 4.773 4.684 4.597 4.511 4.426 4.343 4.261 4.18 4.101 4.024 3.947 3.872 3.798 3.726 3.654 3.584 3.516 3.448 3.382 3.317 3.253 3.19 3.128 3.068 3.008 2.95 2.893 2.836 2.781 2.727 2.674 2.622 2.571 2.52 2.471 2.423 2.375 2.329 2.283 2.238 2.194 2.151 2.109 2.068 2.027 1.987 1.948 1.91 1.872 1.835 1.799 1.764 1.729 1.695 1.661 1.629 1.596 1.565 1.534 1.504 1.474 1.445

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.382" PeakHeight="110.0" Num="3" Error="0.0">
-30.494 13.142 -3.163
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.382" EndFrequency="11.65" PeakHeight="356.569" Num="5" zHalfNm="252.326" Error="2.059">
-211.109 -43.31 11.322 1.963 -0.683
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.752" Depth="0.123"/>
<TopsideChapman PeakHeight="356.569" PeakDensity="1683902.0" PeakScaleHeight="77.799" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
