<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-22 -295 22:50:00.000"
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, Unidentified traces above foF2</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" >
2026.10.22 (295) 22:50:00</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">
FF202629510222250009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.582" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.149" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="515.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="433.810" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="372.809" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.998" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="91.240" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="28.997" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="45.373" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="96.780" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.650" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="130">
<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 10.6 10.65 10.7 10.75 10.8 10.85 10.9
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 366.250 367.500 368.750 370.000 377.500 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 386.667 388.333 390.000 392.500 395.000 397.500 400.000 395.000 395.000 395.000 390.000 385.000 387.500 390.000 395.000 400.000 400.000 402.500 405.000 405.000 407.500 410.000 412.500 415.000 410.000 410.000 411.250 412.500 413.750 415.000 415.000 415.000 415.000 415.000 420.000 425.000 430.000 430.000 432.500 435.000 438.333 441.667 445.000 446.667 448.333 450.000 451.383 452.766 454.149 455.532 456.915 458.298 459.681 461.064 462.447 463.830 465.213 466.596 467.979 469.362 470.745 472.128 473.511 474.894 476.277 477.660 479.043 480.426 481.809 483.191 484.574 485.957 487.340 488.723 490.106 491.489 492.872 494.255 495.638 497.021 498.404 499.787 501.170 502.553 503.936 505.319 506.702 508.085 509.468 510.851 512.234 513.617 515.000 515.000 515.000 521.837 530.656 542.464 559.092 584.247
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 69 72 69 69 69 0 0 72 0 0 69 0 0 0 75 0 66 0 0 0 0 81 0 81 0 0 0 84 0 0 0 0 72 0 66 75 0 75 0 0 69 69 75 75 78 0 81 78 0 0 0 72 75 72 0 0 0 75 0 81 84 78 81 78 81 78 66 75 0 0 63 0 0 63 0 0 0 0 0 0 63 0 0 0 69 0 0 0 0 0 0 0 0 0 0 0 63 0 0 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 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 -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 1.953125 0.390625 -1.953125 -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 1.953125 -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 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 0.390625 -2.734375 0.390625 -0.390625 0.390625 -2.734375 0.390625 0.390625 0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 -2.734375 -2.734375 0.390625 -2.734375 -0.390625 -2.734375 -2.734375 -2.734375 -0.390625 -2.734375 -2.734375 -2.734375 -0.390625 -0.390625 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 1.171875 0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 1.171875 1.171875 2.734375 -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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.303 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.606 180.0 185.0 190.0 195.0 200.0 205.0 210.0 212.909 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 433.81 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.33 0.31 0.283 0.245 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.206 0.229 0.251 0.274 0.296 0.318 0.341 0.354 0.383 0.458 0.541 0.633 0.738 0.856 0.989 1.136 1.298 1.474 1.662 1.863 2.074 2.296 2.527 2.766 3.013 3.267 3.529 3.797 4.073 4.355 4.643 4.938 5.24 5.547 5.861 6.181 6.507 6.838 7.174 7.515 7.858 8.204 8.55 8.894 9.232 9.56 9.872 10.161 10.417 10.629 10.787 10.878 10.9 10.899 10.881 10.839 10.775 10.691 10.589 10.471 10.338 10.192 10.034 9.867 9.691 9.508 9.318 9.124 8.926 8.725 8.522 8.317 8.112 7.907 7.703 7.5 7.298 7.099 6.901 6.707 6.515 6.327 6.142 5.961 5.783 5.609 5.438 5.272 5.11 4.951 4.797 4.646 4.5 4.357 4.218 4.084 3.952 3.825 3.702 3.581 3.465 3.352 3.242 3.136 3.033 2.933 2.837 2.743 2.652 2.564 2.479 2.397 2.317 2.24 2.165 2.093 2.023 1.955 1.89 1.827 1.765 1.706 1.649 1.594 1.54 1.488 1.438 1.39 1.343 1.298 1.254 1.212 1.171 1.132 1.093 1.057 1.021 0.986 0.953 0.921 0.89 0.86 0.831 0.803 0.776 0.749 0.724 0.7 0.676 0.653 0.631 0.61 0.589 0.569 0.55 0.531 0.513 0.496 0.479 0.463 0.447 0.432 0.418 0.403 0.39 0.377 0.364

</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="10.9" PeakHeight="433.81" Num="5" zHalfNm="372.809" Error="2.928">
-210.873 -23.09 19.312 -8.208 1.958
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="102.909" Depth="0.154"/>
<TopsideChapman PeakHeight="433.81" PeakDensity="1474069.5" PeakScaleHeight="45.373" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
