<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 19:50:00.000"
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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.10.28 (301) 19:50:00</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">
FF202630110281950009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.541" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.063" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="430.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="430.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="480.000" 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="2.089" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="379.186" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="268.762" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.474" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="153.837" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.025" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="81.614" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="163.260" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.840" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="39">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
430.000 430.000 432.500 435.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 450.000 455.000 460.000 465.000 465.000 465.000 472.500 480.000 480.000 480.000 490.000 495.000 499.611 504.637 510.135 516.177 522.847 530.247 538.506 547.781 558.273 570.238 584.008 600.027 618.895 641.444 668.870
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 60 66 57 66 0 0 66 66 0 0 0 66 0 54 66 66 66 63 60 63 0 0 0 0 0 0 0 0 0 0 0 0 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 2.734375 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -2.734375 -0.390625 1.171875 1.171875 0.390625 2.734375 0.390625 -2.734375 -2.734375 -0.390625 -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" >
89.735 90.0 95.0 100.0 105.0 110.0 115.0 117.722 120.0 125.0 125.445 130.0 133.167 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.186 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.223 1.401 1.809 2.022 2.089 2.035 1.958 1.958 1.958 1.958 2.035 2.089 2.142 2.288 2.437 2.589 2.747 2.911 3.082 3.26 3.445 3.638 3.837 4.043 4.254 4.47 4.689 4.912 5.137 5.363 5.59 5.816 6.043 6.268 6.492 6.715 6.935 7.154 7.37 7.583 7.794 8.002 8.206 8.407 8.604 8.797 8.984 9.167 9.343 9.513 9.675 9.829 9.974 10.108 10.23 10.338 10.433 10.512 10.574 10.618 10.643 10.65 10.65 10.645 10.632 10.613 10.586 10.553 10.514 10.468 10.418 10.361 10.3 10.234 10.164 10.09 10.011 9.929 9.844 9.755 9.664 9.57 9.474 9.375 9.274 9.172 9.068 8.962 8.856 8.748 8.639 8.53 8.42 8.309 8.198 8.087 7.975 7.864 7.753 7.641 7.53 7.42 7.31 7.2 7.091 6.983 6.875 6.768 6.662 6.557 6.452 6.349 6.246 6.144 6.044 5.944 5.846 5.749 5.653 5.558 5.464 5.371 5.279 5.189 5.1 5.012 4.925 4.839 4.755 4.672 4.59 4.509 4.429 4.351 4.274 4.198 4.123 4.049 3.976 3.905 3.835 3.765 3.697 3.63 3.565 3.5 3.436 3.373 3.312 3.251 3.192 3.133 3.076 3.019 2.964 2.909 2.855 2.803 2.751 2.7 2.65 2.601 2.553 2.505 2.459 2.413 2.368 2.324 2.281 2.238 2.196 2.155 2.115 2.076 2.037 1.999 1.961 1.925 1.888 1.853 1.818 1.784 1.751 1.718 1.686 1.654 1.623

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.089" PeakHeight="110.0" Num="3" Error="0.0">
-29.2 11.295 -2.36
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.089" EndFrequency="10.65" PeakHeight="379.186" Num="5" zHalfNm="268.762" Error="2.038">
-238.701 -12.517 8.1 -4.243 1.342
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="23.167" Depth="0.131"/>
<TopsideChapman PeakHeight="379.186" PeakDensity="1407227.0" PeakScaleHeight="81.614" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
