<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 23:30:00.000"
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 22 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Severe F-spread, F2x cusp not found, 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" >
2026.10.24 (297) 23:30:00</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">
FF202629710242330009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.280" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="38.048" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="349.812" 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="6.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="317.747" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="291.415" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.733" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="39.796" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.230" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="19.454" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="42.840" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.560" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="107">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 340.000 320.000 312.500 305.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.694 301.389 302.083 302.778 303.472 304.167 304.861 305.556 306.250 306.944 307.639 308.333 309.028 309.722 310.417 311.111 311.806 312.500 313.194 313.889 314.583 315.278 315.972 316.667 317.361 318.056 318.750 319.444 320.139 320.833 321.528 322.222 322.917 323.611 324.306 325.000 325.694 326.389 327.083 327.778 328.472 329.167 329.861 330.556 331.250 331.944 332.639 333.333 334.028 334.722 335.417 336.111 336.806 337.500 338.194 338.889 339.583 340.278 340.972 341.667 342.361 343.056 343.750 344.444 345.139 345.833 346.528 347.222 347.917 348.611 349.306 350.000 350.000 346.667 343.333 340.000 340.000 340.000 340.000 340.272 340.579 340.929 341.330 341.796 342.343 342.994 343.783 344.757 345.992 347.608 349.812 353.000 358.017 367.071 388.317
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 60 60 63 69 66 0 60 69 0 60 60 0 66 0 0 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 51 54 0 0 0 45 0 48 51 51 54 51 51 51 51 0 45 48 51 48 51 45 0 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 2.734375 1.171875 0.390625 0.390625 1.171875 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 -0.390625 1.171875 0.390625 1.953125 0.390625 0.390625 -0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 1.171875 -1.171875 -1.171875 -1.171875 1.171875 -0.390625 1.171875 0.390625 0.390625 -0.390625 0.390625 0.390625 2.734375 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 2.734375 1.953125 1.171875 0.390625 2.734375 2.734375 2.734375 1.171875 2.734375 1.953125 1.171875 1.953125 1.953125 1.953125 1.953125 1.171875 1.171875 0.390625 1.171875 1.953125 1.171875 2.734375 2.734375 1.953125 2.734375 1.171875 1.171875 2.734375 1.953125 1.953125 1.171875 1.953125 1.953125 2.734375 1.171875 2.734375 1.953125 2.734375 2.734375 2.734375 1.953125 2.734375 2.734375 1.953125 1.171875 2.734375 1.171875 1.953125 1.953125 1.953125 1.171875 2.734375 1.953125 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="107">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.492 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.983 185.0 190.0 195.0 200.0 205.0 210.0 215.0 216.475 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 317.747 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.332 0.313 0.288 0.254 0.206 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.217 0.239 0.261 0.283 0.304 0.326 0.348 0.354 0.461 0.647 0.898 1.235 1.659 2.153 2.693 3.266 3.864 4.486 5.132 5.804 6.502 7.228 7.984 8.765 9.563 10.35 11.055 11.523 11.6 11.585 11.455 11.211 10.877 10.474 10.023 9.54 9.039 8.53 8.024 7.526 7.042 6.575 6.129 5.705 5.303 4.924 4.568 4.235 3.923 3.632 3.361 3.109 2.875 2.657 2.456 2.269 2.096 1.936 1.788 1.651 1.525 1.408 1.3 1.2 1.107 1.022 0.943 0.871 0.804 0.742 0.685 0.632 0.583 0.538 0.497 0.458 0.423 0.39 0.36 0.332 0.307 0.283 0.261 0.241 0.223 0.205

</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="11.6" PeakHeight="317.747" Num="5" zHalfNm="291.415" Error="1.771">
-94.681 -13.787 11.386 -5.636 1.446
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="106.475" Depth="0.154"/>
<TopsideChapman PeakHeight="317.747" PeakDensity="1669478.9" PeakScaleHeight="19.454" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
