<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 22:10:00.000"
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: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o 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" >
2026.10.28 (301) 22:10:00</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">
FF202630110282210009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.415" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="16.540" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="475.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="475.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="580.294" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="490.356" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="435.177" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.396" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="86.062" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.917" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="40.454" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="109.430" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.010" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="76">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
480.000 478.333 476.667 475.000 475.000 475.000 475.000 475.000 476.667 478.333 480.000 481.667 483.333 485.000 486.667 488.333 490.000 491.667 493.333 495.000 496.667 498.333 500.000 501.250 502.500 503.750 505.000 510.000 512.500 515.000 517.500 520.000 522.273 524.545 526.818 529.091 531.364 533.636 535.909 538.182 540.455 542.727 545.000 550.000 552.500 555.000 557.500 560.000 560.000 555.000 550.000 552.500 555.000 560.000 560.000 560.000 560.000 560.000 560.000 560.000 560.000 562.500 565.000 565.000 565.000 565.000 565.000 565.000 565.000 565.000 567.160 570.053 574.128 580.294 590.717 612.133
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 0 66 60 63 60 0 66 0 0 0 0 0 0 0 0 57 0 0 0 0 57 57 57 0 60 57 0 60 0 57 0 0 0 0 0 60 60 63 66 60 63 63 63 0 0 0 63 63 66 66 69 66 63 0 66 0 72 75 72 0 72 69 66 69 60 69 69 63 60 60 60 66 63 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -1.953125 1.171875 0.390625 0.390625 0.390625 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 -2.734375 -1.171875 1.171875 -1.953125 -0.390625 0.390625 -1.171875 1.171875 1.171875 -2.734375 0.390625 1.171875 2.734375 -1.953125 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 2.734375 1.953125 1.953125 1.171875 1.171875 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 1.953125 2.734375 1.953125 2.734375 1.953125 1.953125 1.953125 -1.171875
</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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.454 145.0 150.0 155.0 160.0 165.0 170.0 174.908 175.0 180.0 185.0 190.0 195.0 200.0 205.0 207.362 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 490.356 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 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 0.342 0.327 0.305 0.273 0.229 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.224 0.248 0.272 0.295 0.319 0.343 0.354 0.376 0.422 0.474 0.532 0.595 0.662 0.732 0.806 0.882 0.96 1.039 1.12 1.202 1.286 1.37 1.456 1.542 1.63 1.719 1.809 1.9 1.993 2.087 2.183 2.279 2.378 2.478 2.58 2.683 2.789 2.896 3.005 3.117 3.231 3.347 3.466 3.588 3.712 3.84 3.97 4.105 4.243 4.385 4.531 4.682 4.838 5.0 5.167 5.342 5.524 5.714 5.913 6.121 6.337 6.555 6.75 6.849 6.85 6.841 6.814 6.769 6.709 6.634 6.547 6.449 6.341 6.225 6.102 5.973 5.839 5.701 5.561 5.419 5.275 5.13 4.986 4.842 4.699 4.557 4.417 4.278 4.142 4.009 3.878 3.75 3.624 3.502 3.383 3.267 3.154 3.044 2.937 2.833 2.733 2.635 2.541 2.45 2.361 2.276 2.193 2.113 2.035 1.961 1.889 1.819 1.752 1.687 1.625 1.564 1.506 1.45 1.396 1.344 1.294 1.245 1.199 1.154 1.11 1.069 1.029 0.99 0.953 0.917 0.882 0.849 0.817 0.786 0.757 0.728 0.701 0.674 0.649 0.624 0.601 0.578 0.556 0.535 0.515 0.495 0.477 0.459 0.441 0.425 0.408 0.393 0.378 0.364 0.35 0.337 0.324 0.312 0.3 0.289 0.278 0.267 0.257 0.247 0.238 0.229 0.22

</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="6.85" PeakHeight="490.356" Num="5" zHalfNm="435.177" Error="1.95">
-231.084 -90.666 52.42 -15.034 1.37
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.362" Depth="0.154"/>
<TopsideChapman PeakHeight="490.356" PeakDensity="582165.0" PeakScaleHeight="40.454" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
